INCOME TAXES (Details) - USD ($)	12 Months Ended
	Jan. 31, 2021	Jan. 31, 2020	Jan. 31, 2019
Income Tax Disclosure [Abstract]
Deferred Tax Assets, Tax Credit Carryforwards	$ 40,641,000	$ 36,198,000
Deferred Tax Assets, Valuation Allowance	232,000	232,000
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount			$ 9,000
Tax Credit Carryforward, Amount	5,200,000	9,000,000.0	21,200,000
Deferred Tax Assets, Tax Credit Carryforwards, Research	900,000	400,000	4,600,000
Income Taxes Paid	1,274,000	565,000	855,000
Proceeds from Income Tax Refunds	655,000	11,000	1,132,000
Unrecognized Tax Benefits	8,380,000	$ 7,370,000	$ 9,232,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	20,000
Increase (Decrease) in Provision For Income Taxes	$ (8,340,000)