| Organization, Consolidation and Presentation of Financial Statements [Abstract] | Period [Axis] |
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2015-12-27 - 2016-12-31 |
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Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
Inventories | Inventories are comprised of the following (in thousands): | | | | | | | | | As of | | December 31, 2016 | December 26, 2015 | Raw materials | $ | 50 |
| $ | 76 |
| Finished goods | 11,297 |
| 3,737 |
| Total inventories, net | $ | 11,347 |
| $ | 3,813 |
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Property and Equipment, Net | Property and equipment, net, are comprised of the following (in thousands): | | | | | | | | | As of | | December 31, 2016 | December 26, 2015 | Equipment and machinery | $ | 20,611 |
| $ | 14,932 |
| Furniture and fixtures | 654 |
| 308 |
| Leasehold improvements | 3,367 |
| 2,248 |
| Software | 2,519 |
| 1,963 |
| Total property and equipment | 27,151 |
| 19,451 |
| Less accumulated depreciation and amortization | (15,342 | ) | (10,035 | ) | Total property and equipment, net | $ | 11,809 |
| $ | 9,416 |
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Accrued Liabilities | Accrued liabilities are comprised of the following (in thousands): | | | | | | | | | As of | | December 31, 2016 | December 26, 2015 | Accrued employee-related costs | $ | 25,468 |
| $ | 25,392 |
| Accrued inventory and other purchases | 1,778 |
| 2,452 |
| Accrued taxes payable | 1,977 |
| 1,918 |
| Accrued professional services | 667 |
| 1,655 |
| Other accruals | 4,759 |
| 5,625 |
| Total accrued liabilities | $ | 34,649 |
| $ | 37,042 |
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Accrued Warranty Liability | Accrued Warranty is comprised of the following (in thousands): | | | | | | | | | | | | Fiscal Year Ended | | December 31, 2016 | December 26, 2015 | December 27, 2014 | Accrued warranty balance at beginning of period | $ | 807 |
| $ | 875 |
| $ | 686 |
| Accrual for warranty during the period | 1,560 |
| 984 |
| 949 |
| Actual costs incurred | (1,407 | ) | (1,052 | ) | (760 | ) | Accrued warranty balance at end of period | $ | 960 |
| $ | 807 |
| $ | 875 |
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| | | | | | | | | As of | Warranty accrual reported as: | December 31, 2016 | December 26, 2015 | Current | $ | 653 |
| $ | 490 |
| Non-current | 307 |
| 317 |
| Total accrued warranty | $ | 960 |
| $ | 807 |
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Deferred Revenue | Deferred revenue is comprised of the following (in thousands): | | | | | | | | | As of | | December 31, 2016 | December 26, 2015 | Deferred service revenue | $ | 97,646 |
| $ | 73,454 |
| Deferred product revenue | 136 |
| $ | 8,677 |
| Total deferred revenue | $ | 97,782 |
| $ | 82,131 |
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Accumulated Other Comprehensive Income | The following summarizes the activity within accumulated other comprehensive income (loss) (in thousands): | | | | | | Accumulated Other Comprehensive Income (Loss) | | Net Unrealized Gains (loss) | Balance as of December 28, 2013 | $ | 23 |
| Available-for-sale securities: | | Unrealized losses | (117 | ) | Total other comprehensive loss | $ | (117 | ) | Balance as of December 27, 2014 | (94 | ) | Available-for-sale securities: | | Unrealized gains, net | 47 |
| Total other comprehensive income | $ | 47 |
| Balance as of December 26, 2015 | (47 | ) | Available-for-sale securities: | | Unrealized gains, net | 30 |
| Total other comprehensive income | 30 |
| Balance as of December 31, 2016 | $ | (17 | ) |
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