Note 6 - Balance Sheet - Continuing Operations (Tables)

3 Months Ended

Apr. 30, 2022

Notes Tables

Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]

	As of April 30, 2022								As of January 31, 2022
	(in thousands)
	Current			Long-term		Total			Current			Long-term		Total
Accounts receivable	$	9,881		$	428	$	9,453		$	8,610		$	650	$	9,260
Less allowance for doubtful accounts		(484	)		—		(484	)		(484	)		—		(484	)
Accounts receivable net of allowance for doubtful accounts	$	9,397		$	428	$	8,969		$	8,126		$	650	$	8,776

Schedule of Inventory, Current [Table Text Block]

	April 30, 2022			January 31, 2022
	(in thousands)
Inventories:
Raw materials	$	8,005		$	8,511
Finished goods		4,300			3,806
Work in progress		3,838			3,567
Cost of inventories		16,143			15,884
Less allowance for obsolescence		(1,900	)		(1,878	)
Total inventories, net	$	14,243		$	14,006

Property, Plant and Equipment [Table Text Block]

	April 30, 2022			January 31, 2022
	(in thousands)
Property and equipment:
Furniture and fixtures	$	9,856		$	9,865
Autos and trucks		512			495
Marine seismic service equipment		—			3,880
Land and buildings		4,596			4,555
Cost of property and equipment		14,964			18,795
Accumulated depreciation and amortization		(10,902	)		(14,523	)
Total property and equipment, net	$	4,062		$	4,272