Balance Sheet (Tables)

3 Months Ended

Apr. 30, 2020

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Accounts and Contracts Receivables

	As of April 30, 2020								As of January 31, 2020
	Current			Long-term		Total			Current			Long-term		Total
Accounts receivable	$	10,192		$	535	$	10,727		$	15,975		$	403	$	16,378
Less allowance for doubtful accounts	(2,196		)	—		(2,196		)	(4,054		)	—		(4,054		)
Accounts receivable net of allowance for doubtful accounts	$	7,996		$	535	$	8,531		$	11,921		$	403	$	12,324

Schedule of Inventories

	April 30, 2020			January 31, 2020
	(in thousands)
Inventories:
Raw materials	$	7,452		$	7,388
Finished goods	4,017			4,557
Work in progress	3,736			2,720
	15,205			14,665
Less allowance for obsolescence	(1,422		)	(1,404		)
Total inventories, net	$	13,783		$	13,261

Schedule of Seismic Equipment Lease Pool and Property and Equipment

	April 30, 2020			January 31, 2020
	(in thousands)
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool	$	128,418		$	145,134
Land and buildings	4,301			4,274
Furniture and fixtures	10,547			10,530
Autos and trucks	557			561
	143,823			160,499
Accumulated depreciation and amortization	(131,821		)	(146,722		)
Total seismic equipment lease pool and property and equipment, net	$	12,002		$	13,777