Note 6 - Balance Sheet - Continuing Operations (Tables)

6 Months Ended

Jul. 31, 2022

Notes Tables

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

	As of July 31, 2022								As of January 31, 2022
	(in thousands)
	Current			Long-term		Total			Current			Long-term		Total
Accounts receivable	$	7,141		$	213	$	6,928		$	8,610		$	650	$	9,260
Less allowance for doubtful accounts		(484	)		—		(484	)		(484	)		—		(484	)
Accounts receivable net of allowance for doubtful accounts	$	6,657		$	213	$	6,444		$	8,126		$	650	$	8,776

Schedule of Inventory, Current [Table Text Block]

	July 31, 2022			January 31, 2022
	(in thousands)
Inventories:
Raw materials	$	9,198		$	8,511
Finished goods		3,797			3,806
Work in progress		3,324			3,567
Cost of inventories		16,319			15,884
Less allowance for obsolescence		(1,897	)		(1,878	)
Total inventories, net	$	14,422		$	14,006

Property, Plant and Equipment [Table Text Block]

	July 31, 2022			January 31, 2022
	(in thousands)
Property and equipment:
Furniture and fixtures	$	9,913		$	9,865
Autos and trucks		508			495
Marine seismic service equipment		—			3,880
Land and buildings		4,689			4,555
Cost of property and equipment		15,110			18,795
Accumulated depreciation and amortization		(11,097	)		(14,523	)
Total property and equipment, net	$	4,013		$	4,272