Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Schedule of warrant activity (Details)

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Stockholders' Equity - Schedule of warrant activity (Details) - $ / shares
 1 Months Ended 3 Months Ended 12 Months Ended
Jun. 30, 2019
May 01, 2022
May 02, 2021
Jan. 30, 2022
Jan. 31, 2021
Number of options          
Number of warrants, warrants issued (in shares) 495,366        
Warrants Activity          
Class of Warrant or Right [Line Items]          
Average exercise price, warrants outstanding, beginning balance (in dollars per share)   $ 19.20 $ 19.07 $ 19.07  
Average exercise price, warrants issued (in dollars per share)   0 0    
Average exercise price, expired and canceled (in dollars per share)   0 0    
Average exercise price, exercised (in dollars per share)   0 16.00    
Average exercise price, warrants outstanding, ending balance (in dollars per share)   $ 19.20 $ 19.11 $ 19.20 $ 19.07
Number of options          
Number of warrants, warrants outstanding, beginning balance (in shares)   281,750 293,973 293,973  
Number of warrants, warrants issued (in shares)   0 0    
Number of warrants, expired and canceled (in shares)   0 0    
Number of warrants, exercised (in shares)   0 (2,375)    
Number of warrants, warrants outstanding, ending balance (in shares)   281,750 291,598 281,750 293,973
Weighted average remaining contractual life (in years), warrants outstanding, beginning balance   1 year 1 month 28 days 2 years 1 month 2 days 1 year 4 months 28 days 2 years 6 months 25 days
Weighted average remaining contractual life, warrants issued (in years)   0 years 0 years    
Weighted average remaining contractual life, expired and canceled (in years)   0 years 0 years    
Weighted average remaining contractual life, exercised (in years)   0 years 1 month 28 days    
Weighted average remaining contractual life (in years), warrants outstanding, ending balance   1 year 1 month 28 days 2 years 1 month 2 days 1 year 4 months 28 days 2 years 6 months 25 days