Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Jan. 31, 2022	Jan. 31, 2021
Allowance for doubtful accounts
Valuation and Qualifying Accounts Disclosure
Valuation Allowances and Reserves, Beginning Balance	$ 200	$ 200
Valuation Allowances and Reserves, Charged to (Reduced from) Expenses	0	0
Valuation Allowances and Reserves, Deductions from Reserves	0	0
Valuation Allowances and Reserves, Ending Balance	200	200
Product, general, workers’ compensation and automobile liability reserves
Valuation and Qualifying Accounts Disclosure
Valuation Allowances and Reserves, Beginning Balance	1,135	1,700
Valuation Allowances and Reserves, Charged to (Reduced from) Expenses	1,168	1,055
Valuation Allowances and Reserves, Deductions from Reserves	1,138	1,620
Valuation Allowances and Reserves, Ending Balance	$ 1,165	$ 1,135