Long-Term Debt (Details) - USD ($)	1 Months Ended	3 Months Ended			9 Months Ended
	May 31, 2020	Oct. 31, 2021	Jul. 31, 2021	Oct. 31, 2020	Oct. 31, 2021	Oct. 31, 2020	Jan. 31, 2021	May 31, 2018
Debt Instrument [Line Items]
Proceeds from revolving line of credit					$ 0	$ 19,857,000
Class of warrant or right, exercise price of warrants or rights (in USD per share)								$ 0.62
Class of warrant or right, outstanding (in shares)		0			0		954,884
Interest expense, long-term debt		$ 0		$ 300,000	$ 400,000	$ 1,100,000
Class B
Debt Instrument [Line Items]
Issuance of common stock upon exercise of warrants (in shares)			940,953
Loan and Security Agreement
Debt Instrument [Line Items]
Class of warrant or right, outstanding (in shares)							954,884
Revolving Credit Facility | Amended Line of Credit
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity	$ 45,000,000
Proceeds from revolving line of credit	$ 20,000,000