Condensed Consolidated Balance Sheets (Unaudited) (USD $) In Thousands, unless otherwise specified	Jul. 31, 2012	Jan. 31, 2012
Current assets:
Cash and cash equivalents	$ 21,545	$ 15,287
Restricted cash	97	98
Accounts receivable, net	24,016	35,788
Current portion of contracts receivable	2,584	2,273
Inventories, net	6,977	6,708
Deferred tax asset	1,902	2,594
Prepaid income taxes	5,017
Prepaid expenses and other current assets	1,646	2,530
Total current assets	63,784	65,278
Seismic equipment lease pool and property and equipment, net	118,499	120,377
Intangible assets, net	4,332	4,696
Goodwill	4,320	4,320
Prepaid foreign income tax		3,519
Deferred tax asset	1,769
Other assets	578	39
Total assets	193,282	198,229
Current liabilities:
Accounts payable	3,241	13,037
Current maturities long-term debt	175	1,399
Income taxes payable		2,419
Deferred revenue	1,021	543
Accrued expenses and other current liabilities	3,668	6,583
Total current liabilities	8,105	23,981
Non-current income taxes payable	417	5,435
Deferred tax liability		595
Long-term debt, net of current maturities	12,530	12,784
Total liabilities	21,052	42,795
Shareholders' equity:
Preferred stock, $1.00 par value; 1,000 shares authorized; none issued and outstanding
Common stock, $0.01 par value; 20,000 shares authorized; 13,656 and 13,556 shares issued at July 31, 2012 and January 31, 2012, respectively	137	136
Additional paid-in capital	115,736	113,654
Treasury stock, at cost (925 shares at July 31, 2012 and January 31, 2012)	(4,857)	(4,857)
Retained earnings	54,155	39,297
Accumulated other comprehensive income	7,059	7,204
Total shareholders' equity	172,230	155,434
Total liabilities and shareholders' equity	$ 193,282	$ 198,229