Balance Sheet (Tables)

3 Months Ended

Apr. 30, 2013

Balance Sheet [Abstract]

Accounts receivable and contracts receivable

	April 30, 2013			January 31, 2013
	(in thousands)
Accounts receivable:
Accounts receivable	$	31,779		$	26,505
Allowance for doubtful accounts		(3,363	)		(3,374	)
Total accounts receivable, net	$	28,416		$	23,131
Contracts and notes receivable:
Contracts receivable	$	838		$	904
Notes receivable		849			1,471
Less current portion		(1,638	)		(2,096	)
Long-term portion	$	49		$	279

Inventories

	April 30, 2013			January 31, 2013
	(in thousands)
Inventories:
Raw materials	$	3,153		$	3,103
Finished goods		4,191			3,531
Work in progress		1,220			627
		8,564			7,261
Less allowance for obsolescence		(1,119	)		(1,073	)
Total inventories, net	$	7,445		$	6,188

Seismic equipment lease pool and property and equipment

	April 30, 2013			January 31, 2013
	(in thousands)
Seismic equipment lease pool and property and equipment:
Seismic equipment lease pool	$	239,233		$	241,395
Land and buildings		366			366
Furniture and fixtures		8,999			8,899
Autos and trucks		746			748
		249,344			251,408
Accumulated depreciation and amortization		(137,515	)		(131,800	)
Total seismic equipment lease pool and property and equipment, net	$	111,829		$	119,608