Note 13 - Stock Repurchase Program - Schedule of Stock Purchases (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended										84 Months Ended	99 Months Ended
	Jul. 31, 2024	[1]	Apr. 30, 2024	[1]	Jan. 31, 2024	[1]	Oct. 31, 2023	[1]	Jul. 31, 2023	[1]	Apr. 30, 2023	Jul. 31, 2024
Number of Shares Purchased (in shares)	500,000		5,000		24,744		2,300		6,863,789		3,379,522	10,775,355
Average Price Paid per Share (in dollars per share)	$ 0.93		$ 0.79		$ 0.73		$ 0.73		$ 0.73		$ 0.42	$ 0.64
Number of Shares Purchased as Part of Publicly Announced Plans or Programs (in shares)	500,000		5,000		24,744		2,300		6,863,789		3,379,522	10,775,355
Approximate Dollar Value of Shares That May Yet Be Purchased Under the Plan or Programs	$ 2,071		$ 2,536		$ 2,540		$ 2,558		$ 2,560		$ 7,594	$ 2,071	[1]

[1] These shares of common stock were purchased through a private transaction