Nature of Operations, Liquidity and Cash Flows (Details) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	Mar. 18, 2021	Jul. 30, 2022	Jul. 31, 2021	Jul. 30, 2022	Jul. 31, 2021	Jul. 12, 2022	Jan. 29, 2022
Liquidity and Cash Flows [Abstract]
Net loss		$ (4,416)	$ 82	$ (8,846)	$ (1,335)
Accumulated deficit		(129,740)	(114,198)	(129,740)	(114,198)		$ (120,894)
Net cash used in operating activities				(5,893)	(4,934)
Cash and cash equivalents		1,309	2,570	1,309	2,570		1,218
Net working capital		20,400		20,400
Borrowings		3,855	0	3,855	0		9,966
Underwritten offering of common stock (in shares)	416,600
Share price (in dollars per share)	$ 32.50
Gross proceeds of offering	$ 13,500
PIPE Purchase Agreement [Member] | Investor Warrants [Member]
Liquidity and Cash Flows [Abstract]
Share price (in dollars per share)						$ 3.30
Credit Facility [Member]
Liquidity and Cash Flows [Abstract]
Borrowings		3,900	0	3,900	0		$ 10,000
Outstanding letters of credit		0	0	0	0
Available borrowings		$ 7,700	$ 10,900	$ 7,700	$ 10,900