Income Taxes - Significant components of the company's income tax provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Components of Income Tax Expense (Benefit), Continuing Operations [Abstract]
Current Federal Tax Expense (Benefit)	$ 3,500	$ 3,401	$ 6,910
Current State and Local Tax Expense (Benefit)	688	416	1,099
Current Foreign Tax Expense (Benefit)	529	98	735
Currentl tax expense	4,717	3,915	8,744
Deferred Federal Income Tax Expense (Benefit)	(1,508)	1,271	1,018
Deferred State and Local Income Tax Expense (Benefit)	(131)	204	73
Deferred Foreign Income Tax Expense (Benefit)	(2,681)	31	(138)
Deferred expense (benefit)	(4,320)	1,506	953
Income tax expense	$ 397	$ 5,421	$ 9,697