CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Deficit [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]
Balance at Jan. 02, 2016	$ 20,643	$ 49	$ 184,277	$ (153,898)	$ (4,324)	$ (5,461)
Balance (in shares) at Jan. 02, 2016		9,547,672
Shares issued for employee stock purchase plan	21		21
Shares issued for employee stock purchase plan (in shares)		17,092
Non-vested stock grants	0
Non-vested stock grants (in shares)		172,422
Non-vested stock forfeitures	0
Non-vested stock forfeitures (in shares)		(77,558)
Share-based compensation expense	302		302
Incentive warrants vested	53		53
Put option forfeited	17		17
Put option exercised	0		85		(85)
Other comprehensive income - Foreign currency translation adjustment	(1,321)					(1,321)
Net loss	(13,883)			(13,883)
Balance at Dec. 31, 2016	5,832	$ 50	184,754	(167,781)	(4,409)	(6,782)
Balance (in shares) at Dec. 31, 2016		9,659,628
Shares issued for employee stock purchase plan	1		1
Shares issued for employee stock purchase plan (in shares)		1,311
Non-vested stock grants	0	$ 1	(1)
Non-vested stock grants (in shares)		140,000
Non-vested stock forfeitures	0
Non-vested stock forfeitures (in shares)		(141,222)
Shares issued in connection with business acquisition	1,317	$ 2	1,315
Shares issued in connection with business acquisition (in shares)		461,055
Share-based compensation expense	53		53
Incentive warrants vested	57		57
Other comprehensive income - Foreign currency translation adjustment	114					114
Net loss	(6,243)			(6,243)
Balance at Dec. 30, 2017	$ 1,131	$ 53	$ 186,179	$ (174,024)	$ (4,409)	$ (6,668)
Balance (in shares) at Dec. 30, 2017		10,120,772