Note 6 - Balance Sheet - Continuing Operations - Schedule of Accounts Receivable (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Jan. 31, 2022
Accounts receivable	$ 9,453	$ 9,260
Less allowance for doubtful accounts	(484)	(484)
Accounts receivable net of allowance for doubtful accounts	8,969	8,776
Other Current Assets [Member]
Accounts receivable	9,881	8,610
Less allowance for doubtful accounts	(484)	(484)
Accounts receivable net of allowance for doubtful accounts	9,397	8,126
Other Noncurrent Assets [Member]
Accounts receivable	428	650
Less allowance for doubtful accounts	0	0
Accounts receivable net of allowance for doubtful accounts	$ 428	$ 650