Note 4 - Discontinued Operations - Held for Sale and Discontinued Operations (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 30, 2024	Apr. 30, 2023
Net loss from discontinued operations	$ 0	$ (116)
Discontinued Operations, Disposed of by Sale [Member]
Revenue from discontinued operations	0	1,989
Cost of discontinued operations	0	1,108
Selling, general and administrative	0	568
Research and development	0	295
Depreciation and amortization	0	148
Total operating expenses	0	1,011
Operating loss	0	(130)
Other income	0	21
Loss before income taxes from discontinued operations	0	(109)
Provision for income taxes from discontinued operations	0	(7)
Net loss from discontinued operations	0	(116)
Depreciation and amortization	$ 0	$ 148