Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Reconciliation of net loss to net cash provided by operating activities:
Net loss	$ (1,903)	$ (13,379)
Depreciation and amortization	10,311	22,263
Deferred income tax benefit	(411)	(612)
Foreign currency exchange losses (gains)	(642)	51
Amortization of deferred financing costs	342	310
Amortization of stock-based compensation	2	(2)
Non-cash revenue	(5)	(289)
Decrease in receivables	13,671	780
Increase in other assets	(389)	(243)
Increase in deferred revenue	11	2,188
Increase (decrease) in accounts payable and other liabilities	(633)	3,067
Net cash provided by operating activities	20,354	14,134
Cash flows from investing activities:
Cash invested in seismic data	(9,744)	(5,748)
Cash paid to acquire property and equipment	(100)	(136)
Advances to Seitel Holdings, Inc.	(2)	(3)
Net cash used in investing activities	(9,846)	(5,887)
Cash flows from financing activities:
Principal payments on capital lease obligations	(69)	(53)
Net cash used in financing activities	(69)	(53)
Effect of exchange rate changes	(46)	60
Net increase in cash and cash equivalents	10,393	8,254
Cash and cash equivalents at beginning of period	70,581	55,997
Cash and cash equivalents at end of period	80,974	64,251
Supplemental disclosure of cash flow information:
Interest	31	34
Income taxes, net of refunds received	3,363	309
Supplemental schedule of non-cash investing and financing activities:
Additions to seismic data library	$ 0	$ 250