CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Balance at Dec. 29, 2017	$ 42,936	$ 414	$ 204,920	$ (1,150)	$ (161,248)
Balance (in shares) at Dec. 29, 2017		41,383
Net income	583				583
Other comprehensive income (loss)	521			521
Common stock issued upon exercise of options	453	$ 1	452
Common stock issued upon exercise of options (in shares)		57
Stock-based compensation	1,423		1,423
Vested restricted stock	1	$ 1
Vested restricted stock (in shares)		152
Balance at Mar. 30, 2018	45,917	$ 416	206,795	(629)	(160,665)
Balance (in shares) at Mar. 30, 2018		41,592
Balance at Dec. 28, 2018	132,426	$ 442	289,584	(1,320)	(156,280)
Balance (in shares) at Dec. 28, 2018		44,195
Net income	1,367				1,367
Adoption of ASC/ ASU | Accounting Standards Update 2016-02	113				113
Adoption of ASC/ ASU | Accounting Standards Update 2018-07			(315)		315
Other comprehensive income (loss)	(23)			(23)
Common stock issued upon exercise of options	$ 623		623
Common stock issued upon exercise of options (in shares)	74	74
Stock-based compensation	$ 2,830		2,830
Vested restricted stock	2	$ 2
Vested restricted stock (in shares)		178
Balance at Mar. 29, 2019	$ 137,338	$ 444	$ 292,722	$ (1,343)	$ (154,485)
Balance (in shares) at Mar. 29, 2019		44,447