Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 26, 2015
Deferred tax assets:
Reserves and accruals	$ 11,043	$ 13,712
Deferred revenue	349	1,154
Shared based compensation	2,590	3,856
Tax credit carry-forwards	10,112	8,658
Net operating losses	8,434	13,218
Depreciation & amortization	(2,898)	366
Other	(1,252)	94
Total deferred tax assets	28,378	41,058
Less: Valuation allowance	(10,980)	(36,786)
Total deferred tax assets net of valuation allowance	17,398	4,272
Deferred tax liabilities:
Depreciation & amortization	(6)	(2,537)
Other	(14)	(1,137)
Total deferred tax liabilities	(20)	(3,674)
Net deferred tax assets	$ 17,378	$ 598