Consolidated Statements of Shareholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Deficit [Member]
Balances (in shares) at Dec. 29, 2013		26,721
Balances at Dec. 29, 2013	$ 132,079	$ 267	$ 205,212		$ (73,400)
Issuance of common stock pursuant to share-based compensation awards (in shares)		56
Issuance of common stock pursuant to share-based compensation awards	134	$ 1	133
Effect of share-based compensation	270		270
Other comprehensive income (loss)	(22)			$ (22)
Effect of reverse stock split (in shares)		(13,388)
Effect of reverse stock split		$ (134)	134
Net income (loss)	(24,845)				(24,845)
Balances (in shares) at Dec. 28, 2014		13,389
Balances at Dec. 28, 2014	107,616	$ 134	205,749	(22)	(98,245)
Issuance of common stock pursuant to share-based compensation awards (in shares)		25
Issuance of common stock pursuant to share-based compensation awards	168		168
Effect of share-based compensation	809		809
Other comprehensive income (loss)	22			$ 22
Share issuance related to business combination (in shares)		8,454
Share issuance related to business combination	77,350	$ 85	77,265
Net income (loss)	24,520				24,520
Balances (in shares) at Dec. 31, 2015		21,868
Balances at Dec. 31, 2015	210,485	$ 219	283,991		(73,725)
Issuance of common stock pursuant to share-based compensation awards (in shares)		314
Issuance of common stock pursuant to share-based compensation awards	1,792	$ 3	1,789
Effect of share-based compensation	3,878		3,878
Share issuance related to business combination (in shares)		50
Share issuance related to business combination	500	$ 1	499
Special Dividend ($1.71 per share)	(23,529)				(23,529)
Net income (loss)	16,300				16,300
Balances (in shares) at Dec. 31, 2016		21,868
Balances at Dec. 31, 2016	$ 209,426	$ 223	$ 290,157		$ (80,954)