Balance Sheet (Tables)

3 Months Ended

Apr. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Accounts and Contracts Receivables

	April 30, 2018			January 31, 2018
	(in thousands)
Accounts receivable	$	12,291		$	16,392
Contracts receivable	4,402			4,921
	16,693			21,313
Less long-term portion	(800		)	(6,934		)
Current accounts and contracts receivable	15,893			14,379
Less current portion of allowance for doubtful accounts	(3,560		)	(3,885		)
Current portion of accounts and contracts receivable, net of allowance for doubtful accounts	$	12,333		$	10,494

Schedule of Inventories

	April 30, 2018			January 31, 2018
	(in thousands)
Inventories:
Raw materials	$	5,363		$	5,099
Finished goods	6,371			6,185
Work in progress	1,372			1,247
	13,106			12,531
Less allowance for obsolescence	(1,674		)	(1,675		)
Total inventories, net	$	11,432		$	10,856

Schedule of Seismic Equipment Lease Pool and Property and Equipment

	April 30, 2018			January 31, 2018
	(in thousands)
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool	$	170,654		$	174,274
Land and buildings	3,381			3,380
Furniture and fixtures	10,504			10,222
Autos and trucks	761			722
	185,300			188,598
Accumulated depreciation and amortization	(164,254		)	(165,698		)
Total seismic equipment lease pool and property and equipment, net	$	21,046		$	22,900