Stockholders' Equity - Schedule of warrant activity (Details) - $ / shares	1 Months Ended	9 Months Ended		12 Months Ended
	Jun. 30, 2019	Oct. 31, 2021	Nov. 01, 2020	Jan. 31, 2021	Feb. 02, 2020
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)		$ 19.07	$ 16.83	$ 16.83
Average exercise price, warrants issued (in dollars per share)		0	0
Average exercise price, expired and canceled (in dollars per share)		9.83	0
Average exercise price, exercised (in dollars per share)		16.00	16.00
Average exercise price, warrants outstanding, ending balance (in dollars per share)		$ 19.20	$ 17.14	$ 19.07	$ 16.83
Number of options
Number of warrants, warrants outstanding, beginning balance (in shares)		293,973	1,039,120	1,039,120
Number of warrants, warrants issued (in shares)		0	0
Number of warrants, expired and canceled (in shares)		(98)	0
Number of warrants, exercised (in shares)		(12,125)	(246,622)
Number of warrants, warrants outstanding, ending balance (in shares)		281,750	792,498	293,973	1,039,120
Weighted average remaining contractual life (in years), warrants outstanding, beginning balance		1 year 7 months 28 days	1 year 4 months 17 days	2 years 6 months 25 days	1 year 11 months 4 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)		1 month 2 days	8 months 15 days
Weighted average remaining contractual life (in years), warrants outstanding, ending balance		1 year 7 months 28 days	1 year 4 months 17 days	2 years 6 months 25 days	1 year 11 months 4 days