Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Stock Subscriptions Receivable [Member]	Additional Paid-in Capital [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Treasury Stock [Member]	Total
Balance (in shares) at Dec. 28, 2019	15,826,891					2,823,172
Balance at Dec. 28, 2019	$ 791	$ 0	$ 108,452	$ (2,748)	$ (59,105)	$ (14,987)	$ 32,403
Issuance of stock under employee stock purchase plan (in shares)	117,983					0
Issuance of stock under employee stock purchase plan	$ 6	0	202	0	0	$ 0	208
Stock subscription receivable (in shares)	0					0
Stock subscription receivable	$ 0	(420)	420	0	0	$ 0	0
Foreign currency translation adjustment	0	0	0	198	0	0	198
Share-based compensation expense	$ 0	0	528	0	0	$ 0	528
Issuance of stock upon vesting of restricted share awards (in shares)	279,317					0
Issuance of stock upon vesting of restricted share awards	$ 14	0	(14)	0	0	$ 0	0
Purchase of treasury stock (in shares)	0					1,858,139
Purchase of treasury stock	$ 0	0	0	0	0	$ (2,230)	(2,230)
Net income (loss)	$ 0	0	0	0	(8,869)	$ 0	(8,869)
Balance (in shares) at Jan. 02, 2021	16,224,191					4,681,311
Balance at Jan. 02, 2021	$ 811	(420)	109,588	(2,550)	(67,974)	$ (17,217)	22,238
Issuance of stock under employee stock purchase plan (in shares)	101,784					0
Issuance of stock under employee stock purchase plan	$ 5	0	131	0	0	$ 0	136
Stock subscription receivable (in shares)	250,000					0
Stock subscription receivable	$ 13	420	(13)	0	0	$ 0	420
Foreign currency translation adjustment	0	0	0	(149)	0	0	(149)
Share-based compensation expense	$ 0	0	1,358	0	0	$ 0	1,358
Issuance of stock upon vesting of restricted share awards (in shares)	327,182					0
Issuance of stock upon vesting of restricted share awards	$ 16	0	(16)	0	0	$ 0	$ 0
Purchase of treasury stock (in shares)	0					1,930,911	1,930,911
Purchase of treasury stock	$ 0	0	0	0	0	$ (9,043)	$ (9,043)
Net income (loss)	0	0	0	0	10,989	0	10,989
Effect of excess tax deduction over book expense associated with exercise of equity awards	$ 0	0	20	0	0	$ 0	20
Balance (in shares) at Jan. 01, 2022	16,903,157					6,612,222
Balance at Jan. 01, 2022	$ 845	$ 0	$ 111,068	$ (2,699)	$ (56,985)	$ (26,260)	$ 25,969