Note 4 - Liquidity (Details Textual) - USD ($)	12 Months Ended
	Jan. 31, 2022	Apr. 21, 2022
Lease Equipment, Available for Sale	$ 700,000
Preferred Stock, Shares Available for Issuance (in shares)	317,000
Common Stock, Shares Available for Issuance (in shares)	13,800,000
Working Capital (Deficit)	$ 18,500,000
Cash, Ending Balance	5,100,000
Unbilled Contracts Receivable	13,100,000
Proceeds from Issuance or Sale of Equity, Total	$ 5,200,000
Subsequent Event [Member]
Unbilled Contracts Receivable		$ 23,600,000
Subsequent Event [Member] | Firm Orders [Member]
Unbilled Contracts Receivable		5,700,000
Subsequent Event [Member] | RFQs [Member]
Unbilled Contracts Receivable		$ 4,800,000