Balance Sheet (Tables)

9 Months Ended

Oct. 31, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Accounts and Contracts Receivables

	As of October 31, 2019								As of January 31, 2019
	Current			Long-term		Total			Current			Long-term		Total
Accounts receivable	$	15,016		$	—	$	15,016		$	14,195		$	712	$	14,907
Less allowance for doubtful accounts	(2,069		)	—		(2,069		)	(2,113		)	—		(2,113		)
Accounts receivable net of allowance for doubtful accounts	$	12,947		$	—	$	12,947		$	12,082		$	712	$	12,794

Schedule of Inventories

	October 31, 2019			January 31, 2019
	(in thousands)
Inventories:
Raw materials	$	7,363		$	5,446
Finished goods	3,602			5,229
Work in progress	3,730			1,322
	14,695			11,997
Less allowance for obsolescence	(1,136		)	(1,223		)
Total inventories, net	$	13,559		$	10,774

Schedule of Seismic Equipment Lease Pool and Property and Equipment

	October 31, 2019			January 31, 2019
	(in thousands)
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool	$	145,914		$	147,519
Land and buildings	4,213			4,041
Furniture and fixtures	10,450			9,897
Autos and trucks	571			571
	161,148			162,028
Accumulated depreciation and amortization	(147,127		)	(147,873		)
Total seismic equipment lease pool and property and equipment, net	$	14,021		$	14,155