Condensed Consolidated Balance Sheets (Unaudited) $ in Thousands, € in Millions	Sep. 30, 2016 EUR (€)	Sep. 30, 2016 USD ($)	Dec. 31, 2015 USD ($)	Sep. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)
Current assets:
Cash and cash equivalents		$ 62,536	$ 84,933	$ 88,239	$ 173,608
Accounts receivable, net		34,686	44,365
Unbilled receivables		23,680	19,937
Inventories		33,308	32,721
Prepaid expenses and other current assets		9,910	14,807
Total current assets		164,120	196,763
Property, plant, equipment and seismic rental equipment, net		53,524	72,027
Multi-client data library, net		112,705	132,237
Goodwill	€ 15.7	23,412	26,274
Intangible assets, net		3,526	4,810
Other assets		2,395	2,977
Total assets		359,682	435,088
Current liabilities:
Current maturities of long-term debt		19,226	7,912
Accounts payable		32,034	29,799
Accrued expenses		32,753	34,287
Accrued multi-client data library royalties		22,344	25,045
Deferred revenue		4,395	6,560
Total current liabilities		110,752	103,603
Long-term debt, net of current maturities		144,299	175,080
Other long-term liabilities		44,157	44,365
Total liabilities		299,208	323,048
Equity:
Common stock, $0.01 par value; authorized 26,666,667 shares; outstanding 11,786,297 and 10,702,689 shares at September 30, 2016 and December 31, 2015, respectively, net of treasury stock		118	107
Additional paid-in capital		898,238	894,715
Accumulated deficit		(818,188)	(759,531)
Accumulated other comprehensive loss		(20,063)	(14,781)
Treasury stock, at cost, zero and 353,124 shares at September 30, 2016 and December 31, 2015 respectively		0	(8,551)
Total stockholders’ equity		60,105	111,959
Noncontrolling interest		369	81
Total equity		60,474	112,040
Total liabilities and equity		$ 359,682	$ 435,088