Income Taxes - Income Taxes - Components of Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 26, 2015	Dec. 27, 2014
Deferred tax assets:
Reserves and accruals	$ 13,712	$ 10,744
Deferred revenue	1,154	1,370
Shared based compensation	3,856	4,030
Tax credit carry-forwards	8,658	8,122
Net operating losses	13,218	14,695
Depreciation & amortization	366	2,750
Other	94	372
Total deferred tax assets	41,058	42,083
Less: Valuation allowance	(36,786)	(35,835)
Total deferred tax assets net of valuation allowance	4,272	6,248
Deferred tax liabilities:
Depreciation & amortization	(2,537)	(4,020)
Other	(1,137)	(1,485)
Total deferred tax liabilities	(3,674)	(5,505)
Net deferred tax assets	$ 598	$ 743