| Component: (Network and Table) | |
|---|---|
| Network | 
                      01-Balance Sheet 
                     (http://www.xbrlsite.com/seattlemethod/report/role/BalanceSheet) 
                   | 
               
| Table | Balance Sheet [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Balance Sheet [Hypercube] 
                      | 
                     [Table] | proof:BalanceSheetHypercube | ||
| 2 | 
                         Balance Sheet [Line Items] 
                      | 
                     [Line Items] | proof:BalanceSheetLineItems | ||
| 3 | 
                         Assets [Roll Up] 
                      | 
                     [Abstract] | proof:AssetsRollUp | ||
| 4 | 
                         Current Assets 
                      | 
                     [Concept] Monetary | As Of | Debit | proof:CurrentAssets | 
| 5 | 
                         Noncurrent Assets 
                      | 
                     [Concept] Monetary | As Of | Debit | proof:NoncurrentAssets | 
| 6 | 
                         Assets 
                      | 
                     [Concept] Monetary | As Of | Debit | proof:Assets | 
| 7 | 
                         Liabilities and Equity [Roll Up] 
                      | 
                     [Abstract] | proof:LiabilitiesAndEquityRollUp | ||
| 8 | 
                         Liabilities [Roll Up] 
                      | 
                     [Abstract] | proof:LiabilitiesRollUp | ||
| 9 | 
                         Current Liabilities 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:CurrentLiabilities | 
| 10 | 
                         Noncurrent Liabilities 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:NoncurrentLiabilities | 
| 11 | 
                         Liabilities 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:Liabilities | 
| 12 | 
                         Equity [Roll Up] 
                      | 
                     [Abstract] | proof:EquityRollUp | ||
| 13 | 
                         Equity Attributable To Controlling Interests 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:EquityAttributableToControllingInterests | 
| 14 | 
                         Equity Attributable to Noncontrolling Interests 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:EquityAttributableToNoncontrollingInterests | 
| 15 | 
                         Equity 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:Equity | 
| 16 | 
                         Liabilities and Equity 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:LiabilitiesAndEquity | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      02-Net Assets 
                     (http://www.xbrlsite.com/seattlemethod/report/role/NetAssets) 
                   | 
               
| Table | Net Assets [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Net Assets [Hypercube] 
                      | 
                     [Table] | proof:NetAssetsHypercube | ||
| 2 | 
                         Net Assets [Line Items] 
                      | 
                     [Line Items] | proof:NetAssetsLineItems | ||
| 3 | 
                         Net Assets [Roll Up] 
                      | 
                     [Abstract] | proof:NetAssetsRollUp | ||
| 4 | 
                         Assets 
                      | 
                     [Concept] Monetary | As Of | Debit | proof:Assets | 
| 5 | 
                         Liabilities 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:Liabilities | 
| 6 | 
                         Net Assets 
                      | 
                     [Concept] Monetary | As Of | Debit | proof:NetAssets | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      03-Income Statement 
                     (http://www.xbrlsite.com/seattlemethod/report/role/ComprehensiveIncome) 
                   | 
               
| Table | Comprehensive Income Statement [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Comprehensive Income Statement [Hypercube] 
                      | 
                     [Table] | proof:ComprehensiveIncomeStatementHypercube | ||
| 2 | 
                         Comprehensive Income Statement [Line Items] 
                      | 
                     [Line Items] | proof:ComprehensiveIncomeStatementLineItems | ||
| 3 | 
                         Comprehensive Income [Roll Up] 
                      | 
                     [Abstract] | proof:ComprehensiveIncomeRollUp | ||
| 4 | 
                         Revenues 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:Revenues | 
| 5 | 
                         (Expenses) 
                      | 
                     [Concept] Monetary | For Period | Debit | proof:Expenses | 
| 6 | 
                         Gains 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:Gains | 
| 7 | 
                         (Losses) 
                      | 
                     [Concept] Monetary | For Period | Debit | proof:Losses | 
| 8 | 
                         Net Income 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:NetIncome | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      04-Income Statement (Alternative) 
                     (http://www.xbrlsite.com/seattlemethod/report/role/ComprehensiveIncome2) 
                   | 
               
| Table | Comprehensive Income Statement [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Comprehensive Income Statement [Hypercube] 
                      | 
                     [Table] | proof:ComprehensiveIncomeStatementHypercube | ||
| 2 | 
                         Comprehensive Income Statement [Line Items] 
                      | 
                     [Line Items] | proof:ComprehensiveIncomeStatementLineItems | ||
| 3 | 
                         Comprehensive Income [Roll Up] 
                      | 
                     [Abstract] | proof:ComprehensiveIncomeRollUp | ||
| 4 | 
                         Income from Normal Activities of Entity 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:IncomeFromNormalActivitiesOfEntity | 
| 5 | 
                         Income from Peripheral or Incidental Transactions of Entity 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:IncomeFromPeripheralOrIncidentalTransactionsOfEntity | 
| 6 | 
                         Net Income 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:NetIncome | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      05-Comprehensive Income 
                     (http://www.xbrlsite.com/seattlemethod/report/role/ComprehensiveIncome3) 
                   | 
               
| Table | Comprehensive Income Statement [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Comprehensive Income Statement [Hypercube] 
                      | 
                     [Table] | proof:ComprehensiveIncomeStatementHypercube | ||
| 2 | 
                         Comprehensive Income Statement [Line Items] 
                      | 
                     [Line Items] | proof:ComprehensiveIncomeStatementLineItems | ||
| 3 | 
                         Comprehensive Income [Roll Up] 
                      | 
                     [Abstract] | proof:ComprehensiveIncomeRollUp | ||
| 4 | 
                         Net Income 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:NetIncome | 
| 5 | 
                         Other Comprehensive Income 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:OtherComprehensiveIncome | 
| 6 | 
                         Comprehensive Income 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:ComprehensiveIncome | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      06-Cash Flow 
                     (http://www.xbrlsite.com/seattlemethod/report/role/CashFlow) 
                   | 
               
| Table | Cash Flow [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Cash Flow [Hypercube] 
                      | 
                     [Table] | proof:CashFlowHypercube | ||
| 2 | 
                         Cash Flow [Line Items] 
                      | 
                     [Line Items] | proof:CashFlowLineItems | ||
| 3 | 
                         Net Cash Flow [Roll Up] 
                      | 
                     [Abstract] | proof:NetCashFlowRollUp | ||
| 4 | 
                         Net Cash Flow Operating Activities 
                      | 
                     [Concept] Monetary | For Period | Debit | proof:NetCashFlowOperatingActivities | 
| 5 | 
                         Net Cash Flow Investing Activities 
                      | 
                     [Concept] Monetary | For Period | Debit | proof:NetCashFlowInvestingActivities | 
| 6 | 
                         Net Cash Flow Financing Activities 
                      | 
                     [Concept] Monetary | For Period | Debit | proof:NetCashFlowFinancingActivities | 
| 7 | 
                         Net Cash Flow 
                      | 
                     [Concept] Monetary | For Period | Debit | proof:NetCashFlow | 
| 8 | 
                         Assets Roll Forward [Roll Up] 
                      | 
                     [Abstract] | proof:AssetsRollForward | ||
| 9 | 
                         Assets, Beginning Balance 
                      | 
                     [Concept] Monetary | As Of | Debit | proof:Assets | 
| 10 | 
                         Net Cash Flow 
                      | 
                     [Concept] Monetary | For Period | Debit | proof:NetCashFlow | 
| 11 | 
                         Assets, Ending Balance 
                      | 
                     [Concept] Monetary | As Of | Debit | proof:Assets | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      07-Prior Period Errors 
                     (http://www.xbrlsite.com/seattlemethod/report/role/PriorPeriodErrors) 
                   | 
               
| Table | Prior Period Errors [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Prior Period Errors [Hypercube] 
                      | 
                     [Table] | proof:PriorPeriodErrorsHypercube | ||
| 2 | 
                         Report Date [Axis] 
                      | 
                     [Axis] | proof:ReportDateAxis | ||
| 3 | 
                         Current Report [Member] 
                      | 
                     [Member] | proof:CurrentReportMember | ||
| 4 | 
                         Prior Report [Member] 
                      | 
                     [Member] | proof:PriorReportMember | ||
| 5 | 
                         Prior Period Errors [Line Items] 
                      | 
                     [Line Items] | proof:PriorPeriodErrorsLineItems | ||
| 6 | 
                         Prior Period Errors [Adjustment] 
                      | 
                     [Abstract] | proof:PriorPeriodErrorsAdjustment | ||
| 7 | 
                         Equity, Origionally Stated 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:Equity | 
| 8 | 
                         Changes in Accounting Policy 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:ChangesInAccountingPolicy | 
| 9 | 
                         Correction of an Error 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:CorrectionOfAnError | 
| 10 | 
                         Equity, Restated 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:Equity | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      08-Prior Period Errors (Alternative) 
                     (http://www.xbrlsite.com/seattlemethod/report/role/PriorPeriodErrors2) 
                   | 
               
| Table | Prior Period Errors [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Prior Period Errors [Hypercube] 
                      | 
                     [Table] | proof:PriorPeriodErrorsHypercube | ||
| 2 | 
                         Restatement [Axis] 
                      | 
                     [Axis] | proof:RestatementAxis | ||
| 3 | 
                         Restated [Member] 
                      | 
                     [Member] | proof:RestatedMember | ||
| 4 | 
                         Changes in Accounting Policy [Member] 
                      | 
                     [Member] | proof:ChangesInAccountingPolicyMember | ||
| 5 | 
                         Correction of Accounting Errors [Member] 
                      | 
                     [Member] | proof:CorrectionsOfAccountingErrorsMember | ||
| 6 | 
                         Previously Stated [Member] 
                      | 
                     [Member] | proof:PreviouslyStatedMember | ||
| 7 | 
                         Prior Period Errors [Line Items] 
                      | 
                     [Line Items] | proof:PriorPeriodErrorsLineItems | ||
| 8 | 
                         Prior Period Errors [Adjustment] 
                      | 
                     [Abstract] | proof:PriorPeriodErrorsAdjustment | ||
| 9 | 
                         Equity 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:Equity | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      09-Changes in Equity 
                     (http://www.xbrlsite.com/seattlemethod/report/role/ChangesInEquity) 
                   | 
               
| Table | Changes in Equity [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Changes in Equity [Hypercube] 
                      | 
                     [Table] | proof:ChangesInEquityHypercube | ||
| 2 | 
                         Changes in Equity [Line Items] 
                      | 
                     [Line Items] | proof:ChangesInEquityLineItems | ||
| 3 | 
                         Changes in Equity [Roll Forward] 
                      | 
                     [Abstract] | proof:ChangesInEquityRollForward | ||
| 4 | 
                         Equity, Beginning Balance 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:Equity | 
| 5 | 
                         Comprehensive Income 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:ComprehensiveIncome | 
| 6 | 
                         Investments by Owners 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:InvestmentsByOwners | 
| 7 | 
                         (Distributions to Owners) 
                      | 
                     [Concept] Monetary | For Period | Debit | proof:DistributionsToOwners | 
| 8 | 
                         Equity, Ending Balance 
                      | 
                     [Concept] Monetary | As Of | Credit | proof:Equity | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      10-Policies 
                     (http://www.xbrlsite.com/seattlemethod/report/role/Policies) 
                   | 
               
| Table | Policies [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Policies [Hypercube] 
                      | 
                     [Table] | proof:PoliciesHypercube | ||
| 2 | 
                         Policies [Line Items] 
                      | 
                     [Line Items] | proof:PoliciesLineItems | ||
| 3 | 
                         Basis of Reporting [Text Block] 
                      | 
                     [Concept] String | For Period | proof:BasisOfReportingTextBlock | |
| 4 | 
                         Nature of Operations [Text Block] 
                      | 
                     [Concept] String | For Period | proof:NatureOfOperationsTextBlock | |
| 5 | 
                         Revenue Recognition Policy [Text Block] 
                      | 
                     [Concept] String | For Period | proof:RevenueRecognitionPolicyTextBlock | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      11-Variance Analysis 
                     (http://www.xbrlsite.com/seattlemethod/report/role/VarianceAnalysis) 
                   | 
               
| Table | Variance Analysis [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Variance Analysis [Hypercube] 
                      | 
                     [Table] | proof:VarianceAnalysisHypercube | ||
| 2 | 
                         Scenario [Axis] 
                      | 
                     [Axis] | proof:ScenarioAxis | ||
| 3 | 
                         Actual [Member] 
                      | 
                     [Member] | proof:ActualMember | ||
| 4 | 
                         Budgeted [Member] 
                      | 
                     [Member] | proof:BudgetedMember | ||
| 5 | 
                         Variance [Member] 
                      | 
                     [Member] | proof:VarianceMember | ||
| 6 | 
                         Variance Analysis  [Line Items] 
                      | 
                     [Line Items] | proof:VarianceAnalysisLineItems | ||
| 7 | 
                         Variance Analysis  [Roll Up] 
                      | 
                     [Abstract] | proof:VarianceAnalysisRollUp | ||
| 8 | 
                         Revenues 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:Revenues | 
| 9 | 
                         (Expenses) 
                      | 
                     [Concept] Monetary | For Period | Debit | proof:Expenses | 
| 10 | 
                         Gains 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:Gains | 
| 11 | 
                         (Losses) 
                      | 
                     [Concept] Monetary | For Period | Debit | proof:Losses | 
| 12 | 
                         Net Income 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:NetIncome | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      12-Segment Revenues 
                     (http://www.xbrlsite.com/seattlemethod/report/role/SegmentRevenues) 
                   | 
               
| Table | Segment Revenues [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Segment Revenues [Hypercube] 
                      | 
                     [Table] | proof:SegmentRevenuesHypercube | ||
| 2 | 
                         Segments [Axis] 
                      | 
                     [Axis] | proof:SegmentsAxis | ||
| 3 | 
                         All Segments [Member] 
                      | 
                     [Member] | proof:AllSegmentsMember | ||
| 4 | 
                         Segment Alpha [Member] 
                      | 
                     [Member] | proof:SegmentAlphaMember | ||
| 5 | 
                         Segment Bravo [Member] 
                      | 
                     [Member] | proof:SegmentBravoMember | ||
| 6 | 
                         Segment Charlie [Member] 
                      | 
                     [Member] | proof:SegmentCharlieMember | ||
| 7 | 
                         Segment Revenues [Line Items] 
                      | 
                     [Line Items] | proof:SegmentRevenuesLineItems | ||
| 8 | 
                         Segment Revenues [Set] 
                      | 
                     [Abstract] | proof:SegmentRevenuesSet | ||
| 9 | 
                         Revenues 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:Revenues | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      13-Stock Plan Activity 
                     (http://www.xbrlsite.com/seattlemethod/report/role/StockPlanActivity) 
                   | 
               
| Table | Weighted Average Grant Date Fair Value [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Weighted Average Grant Date Fair Value [Hypercube] 
                      | 
                     [Table] | proof:WeightedAverageGrantDateFairValueHypercube | ||
| 2 | 
                         Weighted Average Grant Date Fair Value [Line Items] 
                      | 
                     [Line Items] | proof:WeightedAverageGrantDateFairValueLineItems | ||
| 3 | 
                         Weighted Average Grant Date Fair Value [Roll Forward Info] 
                      | 
                     [Abstract] | proof:WeightedAverageGrantDateFairValueRollForwardInfo | ||
| 4 | 
                         Nonvested Fair Value, Beginning Balance 
                      | 
                     [Concept] Decimal | As Of | proof:NonvestedFairValue | |
| 5 | 
                         Granted 
                      | 
                     [Concept] Decimal | For Period | proof:Granted | |
| 6 | 
                         Vested 
                      | 
                     [Concept] Decimal | For Period | proof:Vested | |
| 7 | 
                         Forfeited 
                      | 
                     [Concept] Decimal | For Period | proof:Forfeited | |
| 8 | 
                         Nonvested Fair Value, Ending Balance 
                      | 
                     [Concept] Decimal | As Of | proof:NonvestedFairValue | 
| Component: (Network and Table) | |
|---|---|
| Network | 
                      14-Financial Highlights 
                     (http://www.xbrlsite.com/seattlemethod/report/role/FinancialHighlights) 
                   | 
               
| Table | Financial Highlights [Hypercube] | 
| # | Label | Report Element Class | Period Type | Balance | Name | 
|---|---|---|---|---|---|
| 1 | 
                         Financial Highlights [Hypercube] 
                      | 
                     [Table] | proof:FinancialHighlightsHypercube | ||
| 2 | 
                         Financial Highlights [Line Items] 
                      | 
                     [Line Items] | proof:FinancialHighlightsLineItems | ||
| 3 | 
                         Financial Highlights [Set] 
                      | 
                     [Abstract] | proof:FinancialHighlightsSet | ||
| 4 | 
                         Revenues 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:Revenues | 
| 5 | 
                         Comprehensive Income 
                      | 
                     [Concept] Monetary | For Period | Credit | proof:ComprehensiveIncome | 
| 6 | 
                         Distributions to Owners 
                      | 
                     [Concept] Monetary | For Period | Debit | proof:DistributionsToOwners |