Balance Sheet (Tables)

9 Months Ended

Oct. 31, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Schedule of Accounts Receivable

	As of October 31, 2020						As of January 31, 2020
	Current		Long-term		Total		Current		Long-term		Total
Accounts receivable	$	6,653	$	—	$	6,653	$	9,001	$	—	$	9,001
Less allowance for doubtful accounts	(1,044)		—		(1,044)		(2,378)		—		(2,378)
Accounts receivable net of allowance for doubtful accounts	$	5,609	$	—	$	5,609	$	6,623	$	—	$	6,623

Schedule of Inventories

	October 31, 2020		January 31, 2020
	(in thousands)
Inventories:
Raw materials	$	7,019	$	7,388
Finished goods	3,436		3,758
Work in progress	2,698		2,720
	13,153		13,866
Less allowance for obsolescence	(1,273)		(1,210)
Total inventories, net	$	11,880	$	12,656

Schedule of Seismic Equipment Lease Pool and Property and Equipment

	October 31, 2020		January 31, 2020
	(in thousands)
Property and equipment:
Marine seismic service equipment	$	6,970	$	8,341
Land and buildings	4,358		4,274
Furniture and fixtures	9,661		9,364
Autos and trucks	490		491
	21,479		22,470
Accumulated depreciation and amortization	(16,525)		(17,051)
Total property and equipment, net	$	4,954	$	5,419