Quarterly report pursuant to Section 13 or 15(d)

Nature of Operations, Liquidity and Cash Flows (Details)

v3.22.2.2
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