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Note 3 - Accounts Receivable (Details Textual) $ in Thousands	1 Months Ended	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2022 USD ($)	Jul. 31, 2023 USD ($)	Jul. 31, 2022	Jul. 31, 2023 USD ($)	Jul. 31, 2022 USD ($)	Jan. 31, 2023	Jan. 31, 2022	Dec. 31, 2015 USD ($)
Increase (Decrease) in Accounts Receivable				$ 9,865	$ 5,860
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Number of Major Customers		1	0
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Concentration Risk, Percentage		18.80%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Number of Major Customers				1			1
Accounts Receivable [Member] | Customer Concentration Risk [Member] | One Customer [Member]
Concentration Risk, Percentage				14.20%		11.90%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Accounts Receivable, after Allowance for Credit Loss		$ 2,800		$ 2,800				$ 41,900
Increase (Decrease) in Accounts Receivable	$ (900)			(39,100)
Accounts Receivable, Allowance for Credit Loss		0		0
Financial Asset, Equal to or Greater than 90 Days Past Due [Member] | Other Noncurrent Assets [Member]
Accounts Receivable, after Allowance for Credit Loss, Noncurrent		$ 1,600		$ 1,600

X

- Definition

Represents the number of major customers accounting for 10% or more of the specified concentration risk benchmark, which includes, but not limited to, sales revenue, accounts receivable, etc.

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Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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Amount of allowance for credit loss on accounts receivable.

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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.

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