Note 2 - Sale of a Subsidiary and Discontinued Operations - Held for Sale and Discontinued Operations (Details) - USD ($)	12 Months Ended
	Jan. 31, 2024	Dec. 31, 2023	Jan. 31, 2023
Accounts receivable, net	$ 0		$ 746,000
Inventories, net	0		4,292,000
Prepaid expenses and other current assets	0		745,000
Total current assets of discontinued operations	0		5,783,000
Property, plant and equipment, net	0		2,992,000
Intangible and other assets, net	0		1,297,000
Total assets of discontinued operations	0		10,072,000
Accounts payable	0		1,607,000
Deferred revenue	0		20,000
Accrued expenses and other current liabilities	0		769,000
Income taxes payable	0		24,000
Total current liabilities of discontinued operations	0		2,420,000
Revenue from discontinued operations	3,315,000		10,079,000
Cost of discontinued operations	1,979,000		7,145,000
Selling, general and administrative	2,022,000		5,185,000
Depreciation and amortization	338,000		543,000
Total operating expenses	2,360,000		5,728,000
Operating loss	(1,024,000)		(2,794,000)
Other income, including $2.3 million gain on sale of Klein	2,415,000		81,000
Income (loss) before income taxes from discontinued operations	1,391,000		(2,713,000)
Provision for income taxes from discontinued operations	(17,000)		(26,000)
Net income (loss) from discontinued operations	1,374,000		(2,739,000)
Depreciation and amortization	338,000		543,000
Gain (Loss) on Disposition of Property Plant Equipment	0	$ 939,000	939,000
Gain (Loss) on Disposition of Business	2,343,000		0
Non-cash cumulative translation loss for discontinued operations	$ 0		$ 1,626,000