Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014
Current assets:
Cash and cash equivalents	$ 5,175	$ 15,162
Restricted cash	184	81
Accounts receivable, net of allowance for doubtful accounts of $6,339 and $3,833 at January 31, 2015 and 2014, respectively	23,693	29,514
Contracts and notes receivable	3,639	1,005
Inventories, net	11,451	8,338
Prepaid income taxes	1,018	2,177
Deferred tax asset	2,427	1,968
Prepaid expenses and other current assets	6,562	3,915
Total current assets	54,149	62,160
Seismic equipment lease pool and property and equipment, net	100,087	129,573
Intangible assets, net	10,831	3,201
Goodwill	5,594	4,320
Deferred tax asset	8,922	6,133
Other assets	28	32
Total assets	179,611	205,419
Current liabilities:
Accounts payable	2,399	10,745
Current maturities-long-term debt	3,218	75
Deferred revenue	710	35
Accrued expenses and other current liabilities	3,673	1,583
Total current liabilities	10,000	12,438
Non-current income taxes payable		408
Long-term debt, net of current maturities	23,137	22,125
Total liabilities	33,137	34,971
Commitments and contingencies (Note 12, 16 and 17)
Shareholders' equity:
Preferred stock, $1.00 par value; 1,000 shares authorized; none issued and outstanding
Common stock $.01 par value; 20,000 shares authorized; 14,012 and 13,907 shares issued at January 31, 2015 and January 31, 2014, respectively	140	139
Additional paid-in capital	119,787	118,156
Treasury stock, at cost (1,928 and 1,075 shares at January 31, 2015 and 2014, respectively)	(16,851)	(7,075)
Retained earnings	51,924	61,116
Accumulated other comprehensive loss	(8,526)	(1,888)
Total shareholders' equity	146,474	170,448
Total liabilities and shareholders' equity	$ 179,611	$ 205,419