Federal and State Income Taxes - Schedule of Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015
Income Tax Disclosure [Abstract]
Federal income tax expense (benefit) at 35%	$ (1,179)	$ 813
State income tax, net of federal income tax effect	(12)	(416)
Change of effective state tax rate	4
Nondeductible expenses	80	222
Research and development credit	(72)	(297)
Current year expiration of stock options	436	163
Prior year adjustments and true-ups	(354)	2,261
Change in valuation allowance	70	(10,960)
Total tax benefit	$ (1,027)	$ (8,214)