Nature of Operations, Liquidity and Cash Flows (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		9 Months Ended
	Mar. 18, 2021	Oct. 30, 2021	Oct. 31, 2020	Oct. 30, 2021	Oct. 31, 2020	Jan. 30, 2021
Liquidity and Cash Flows [Abstract]
Net loss		$ (886)	$ 2,552	$ (2,221)	$ (3,753)
Accumulated deficit		(115,084)	(112,724)	(115,084)	(112,724)	$ (112,863)
Net cash used in operating activities				(9,990)	(15,272)
Cash and cash equivalents		1,754	2,396	1,754	2,396	1,809
Net working capital		20,600		20,600
Borrowings		5,858	8,483	5,858	8,483	6,339
Underwritten offering of common stock (in shares)	416,600
Share price (in dollars per share)	$ 32.50
Gross proceeds of offering	$ 13,500
Credit Facility [Member]
Liquidity and Cash Flows [Abstract]
Borrowings		5,900		5,900		$ 6,300
Outstanding borrowings		0	0	0	0
Available borrowings		$ 6,800	$ 3,800	$ 6,800	$ 3,800