Leases and Commitments Leases and Commitments (ASC 842 Quantitative Information) (Details) - USD ($)	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 5,086,000	$ 5,742,000
Short-term lease cost	332,000	263,000
Sublease income	(40,000)	(40,000)
Variable lease cost	1,033,000	766,000
Total lease cost	6,411,000	6,731,000
Cash paid for amounts included in the measurement of lease liabilities	5,482,000	5,163,000
Right-of-use assets obtained in exchange for new lease liabilities	$ 599,000	$ 622,000
Weighted-average remaining lease term (years)	3 years 1 month 6 days	4 years 21 days
Weighted-average discount rate	6.40%	6.41%