Balance Sheet (Tables)

9 Months Ended

Oct. 31, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Accounts and Contracts Receivables

	October 31, 2018			January 31, 2018
	(in thousands)
Receivables:
Accounts receivable	$	16,722		$	16,392
Contracts receivable	4,358			4,921
	21,080			21,313
Less long-term portion	(532		)	(6,934		)
Current accounts and contracts receivable	20,548			14,379
Less current portion of allowance for doubtful accounts	(3,108		)	(3,885		)
Current portion of accounts and contracts receivable, net of allowance for doubtful accounts	$	17,440		$	10,494

Schedule of Inventories

	October 31, 2018			January 31, 2018
	(in thousands)
Inventories:
Raw materials	$	4,844		$	5,099
Finished goods	5,916			6,185
Work in progress	1,987			1,247
	12,747			12,531
Less allowance for obsolescence	(1,068		)	(1,675		)
Total inventories, net	$	11,679		$	10,856

Schedule of Seismic Equipment Lease Pool and Property and Equipment

	October 31, 2018			January 31, 2018
	(in thousands)
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool	$	159,312		$	174,274
Land and buildings	4,021			3,380
Furniture and fixtures	10,103			10,222
Autos and trucks	762			722
	174,198			188,598
Accumulated depreciation and amortization	(157,543		)	(165,698		)
Total seismic equipment lease pool and property and equipment, net	$	16,655		$	22,900