Note 3 - Accounts Receivable (Details Textual) $ in Thousands	3 Months Ended			6 Months Ended		12 Months Ended
	Jul. 31, 2026 USD ($)	Apr. 30, 2026	Jul. 31, 2025	Jul. 31, 2026 USD ($)	Jul. 31, 2025 USD ($)	Jan. 31, 2026
Accounts Receivable, Credit Loss Expense (Reversal)	$ 3,900			$ 3,949	$ 361
One Customer [Member]
Accounts Receivable, Allowance for Credit Loss	$ 0			$ 0
Customer Concentration Risk [Member] \| Accounts Receivable [Member]
Number of Major Customers		0	0		0	1
Customer Concentration Risk [Member] \| Accounts Receivable [Member] \| One Customer [Member]
Concentration Risk, Percentage						23.00%
Customer Concentration Risk [Member] \| Revenue Benchmark [Member]
Number of Major Customers	1			1
Customer Concentration Risk [Member] \| Revenue Benchmark [Member] \| One Customer [Member]
Concentration Risk, Percentage	17.00%			16.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.