Acquisition (Tables)

12 Months Ended

Jan. 31, 2013

Acquisition [Abstract]

Amounts recognized for assets acquired and liabilities assumed at the date of acquisition

Working capital	$	327
Seismic equipment lease pool		2,990
Deferred taxes		(1,086	)
Intangible assets		3,154

Consolidated pro forma results of operations (unaudited)

	January 31,
(In thousands, except per share amounts)	2011
Revenues	$	71,524
Net income	$	4,636
Earnings per share:
Basic	$	0.47
Diluted	$	0.46