| Organization, Consolidation and Presentation of Financial Statements [Abstract] | Period [Axis] |
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2016-01-01 - 2016-12-31 |
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Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
Schedule of accounts receivable and revenue reserves | Changes in accounts receivable reserves were as follows (in thousands): | | | | | | | | | | Allowance for Doubtful Accounts | | Revenue Reserve | Balance at December 31, 2013 | $ | 743 |
| | $ | 15,416 |
| Increases | 864 |
| | 42,740 |
| Write-offs/returns taken | (769 | ) | | (31,597 | ) | Balance at December 31, 2014 | 838 |
| | 26,559 |
| Increases | 1,115 |
| | 169,677 |
| Write-offs/returns taken | (128 | ) | | (122,191 | ) | Balance at December 31, 2015 | 1,825 |
| | 74,045 |
| Increases | 339 |
| | 275,815 |
| Write-offs/returns taken | (1,882 | ) | | (251,009 | ) | Balance at December 31, 2016 | $ | 282 |
| | $ | 98,851 |
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Schedule of inventories | Inventories consisted of the following (in thousands): | | | | | | | | | | December 31, | | 2016 | | 2015 | Components | $ | 1,035 |
| | $ | 5,359 |
| Finished goods | 229,352 |
| | 172,787 |
| Total inventories | $ | 230,387 |
| | $ | 178,146 |
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Schedule of prepaid expenses and other current asset | Prepaid expenses and other current assets consisted of the following (in thousands): | | | | | | | | | | December 31, | | 2016 | | 2015 | POP displays, net | $ | 22,804 |
| | $ | 9,990 |
| Derivative assets | 10,625 |
| | 6,002 |
| Prepaid marketing | 5,764 |
| | 150 |
| Other | 27,153 |
| | 27,388 |
| Total prepaid expenses and other current assets | $ | 66,346 |
| | $ | 43,530 |
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Schedule of property and equipment | The useful lives of the property and equipment are as follows: | | | | Tooling and manufacturing equipment | | One to three years | Furniture and office equipment | | Three years | Purchased software | | Three years | Capitalized internally-developed software | | Two to eight years | Leasehold improvements | | Shorter of remaining lease term or ten years |
Property and equipment, net, consisted of the following (in thousands): | | | | | | | | | | December 31, | | 2016 | | 2015 | Tooling and manufacturing equipment | $ | 60,944 |
| | $ | 53,092 |
| Furniture and office equipment | 14,424 |
| | 6,809 |
| Purchased and internally-developed software | 12,032 |
| | 3,794 |
| Leasehold improvements | 28,489 |
| | 8,388 |
| Total property and equipment | 115,889 |
| | 72,083 |
| Less: Accumulated depreciation and amortization | (39,336 | ) | | (27,582 | ) | Property and equipment, net | $ | 76,553 |
| | $ | 44,501 |
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Schedule of goodwill | The changes in the carrying amount of goodwill were as follows (in thousands). See Note 12 for additional information. | | | | | | Goodwill | Balance at December 31, 2014 | $ | — |
| Goodwill acquired | 22,562 |
| Subsequent goodwill adjustments | (405 | ) | Balance at December 31, 2015 | 22,157 |
| Goodwill acquired | 28,879 |
| Balance at December 31, 2016 | $ | 51,036 |
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Schedule of intangible assets (excluding goodwill) | The carrying amounts of the intangible assets as of December 31, 2016 and December 31, 2015 were as follows (in thousands, except useful life). See Note 12 for additional information. In-process research and development is not amortized until the completion or abandonment of the related development.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | December 31, 2016 | | December 31, 2015 | | Weighted Average Remaining Useful Life (years) | | Gross | | Accumulated Amortization | | Net | | Gross | | Accumulated Amortization | | Net | | | | | | | | | | | | | | | | Developed technology | $ | 26,092 |
| | $ | (3,247 | ) | | $ | 22,845 |
| | $ | 12,640 |
| | $ | (1,442 | ) | | $ | 11,198 |
| | 4.8 | Trademarks and other | 1,278 |
| | (542 | ) | | 736 |
| | 1,278 |
| | (260 | ) | | 1,018 |
| | 3.5 | Total finite-lived intangible assets subject to amortization, net | 27,370 |
| | (3,789 | ) | | 23,581 |
| | 13,918 |
| | (1,702 | ) | | 12,216 |
| | | In-process research and development | 3,940 |
| | — |
| | 3,940 |
| | — |
| | — |
| | — |
| | | Total intangible assets, net | $ | 31,310 |
| | $ | (3,789 | ) | | $ | 27,521 |
| | $ | 13,918 |
| | $ | (1,702 | ) | | $ | 12,216 |
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Schedule of estimated future amortization expense | The estimated future amortization expense of acquired finite-lived intangible assets to be charged to cost of revenue and operating expenses after 2016, is as follows (in thousands): | | | | | | | | | | | | | | Cost of Revenue | | Operating Expenses | | Total | 2017 | $ | 5,436 |
| | $ | 230 |
| | $ | 5,666 |
| 2018 | 5,276 |
| | 230 |
| | 5,506 |
| 2019 | 4,496 |
| | 230 |
| | 4,726 |
| 2020 | 3,716 |
| | 46 |
| | 3,762 |
| 2021 | 3,557 |
| | — |
| | 3,557 |
| Thereafter | 364 |
| | — |
| | 364 |
| Total intangible assets, net | $ | 22,845 |
| | $ | 736 |
| | $ | 23,581 |
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Schedule of accrued liabilities | Accrued liabilities consisted of the following (in thousands): | | | | | | | | | | December 31, | | 2016 | | 2015 | Product warranty | $ | 99,923 |
| | $ | 40,212 |
| Accrued manufacturing expense and freight | 75,579 |
| | 10,723 |
| Accrued sales incentives | 74,181 |
| | 24,324 |
| Accrued sales and marketing | 41,948 |
| | 33,389 |
| Accrued co-op advertising and marketing development funds | 40,002 |
| | 29,077 |
| Employee related liabilities | 13,934 |
| | 27,394 |
| Sales taxes and VAT payable | 8,891 |
| | 8,349 |
| Inventory received but not billed | 7,363 |
| | 4,292 |
| Accrued legal fees | 3,963 |
| | 3,138 |
| Derivative liabilities | 3,780 |
| | 2,640 |
| Customer deposits | 1,923 |
| | 2,062 |
| Other | 19,074 |
| | 14,499 |
| Accrued liabilities | $ | 390,561 |
| | $ | 200,099 |
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Schedule of product warranty reserves | Product warranty reserve activities were as follows (in thousands): | | | | | | | | Reserve For Product Warranty(1) | Balance at December 31, 2013 | $ | 8,480 |
| Charged to cost of revenue | 19,462 |
| Settlement of claims | (7,844 | ) | Balance at December 31, 2014 | 20,098 |
| Charged to cost of revenue | 55,642 |
| Changes in estimate related to pre-existing warranties | (8,968 | ) | Settlement of claims | (26,560 | ) | Balance at December 31, 2015 | $ | 40,212 |
| Charged to cost of revenue | 134,771 |
| Changes in estimate related to pre-existing warranties | 4,073 |
| Settlement of claims | (79,133 | ) | Balance at December 31, 2016 | $ | 99,923 |
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| | (1) | Does not include reserves established as a result of the recall of the Fitbit Force. See the section titled “—Fitbit Force Recall Reserve” for additional information regarding such reserves. |
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Schedule of product recall reserves | Fitbit Force recall reserve activities were as follows (in thousands): | | | | | | | | Reserve For Fitbit Force Recall | Balance at December 31, 2013 | $ | 82,938 |
| Charged to revenue | 8,112 |
| Charged to cost of revenue | 11,339 |
| Charged to general and administrative | 505 |
| Settlement of claims | (80,418 | ) | Balance at December 31, 2014 | 22,476 |
| Charged to cost of revenue | (5,755 | ) | Charged to general and administrative | (1,174 | ) | Settlement of claims | (10,425 | ) | Balance at December 31, 2015 | 5,122 |
| Settlement of claims | (3,869 | ) | Balance at December 31, 2016 | $ | 1,253 |
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Schedule of accumulated other comprehensive income | The components and activity of accumulated other comprehensive income (“AOCI”), net of tax, were as follows (in thousands): | | | | | | | | | | | | | | | | | | Unrealized Gains on Cash Flow Hedges | | Currency Translation Adjustments | | Unrealized Gains (Losses) on Available-for-Sale Investments | | Total | Balance at December 31, 2014 | $ | — |
| | $ | 37 |
| | $ | — |
| | $ | 37 |
| Other comprehensive income (loss) before reclassifications | 1,276 |
| | (42 | ) | | (63 | ) | | 1,171 |
| Amounts reclassified from AOCI | (525 | ) | | — |
| | 8 |
| | (517 | ) | Other comprehensive income (loss) | 751 |
| | (42 | ) | | (55 | ) | | 654 |
| Balance at December 31, 2015 | 751 |
| | (5 | ) | | (55 | ) | | 691 |
| Other comprehensive income (loss) before reclassifications | 9,422 |
| | (309 | ) | | (126 | ) | | 8,987 |
| Amounts reclassified from AOCI | (10,650 | ) | | — |
| | (6 | ) | | (10,656 | ) | Other comprehensive income (loss) | (1,228 | ) | | (309 | ) | | (132 | ) | | (1,669 | ) | Balance at December 31, 2016 | $ | (477 | ) | | $ | (314 | ) | | $ | (187 | ) | | $ | (978 | ) |
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