CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Cash flows from operating activities:
Net loss	$ (2,340)	$ (21,248)
Adjustments to reconcile net loss to cash (used in) provided by operating activities:
Depreciation and amortization (other than multi-client data library)	840	1,035
Amortization of multi-client data library	8,020	11,100
Stock-based compensation expense	617	1,293
Impairment of multi-client data library	1,167
Impairment of goodwill	4,150	0
Deferred income taxes	421	(1,398)
Changes in operating assets and liabilities:
Accounts receivable	(21,868)	(2,870)
Unbilled receivables	2,666	29,498
Inventories	(772)	81
Accounts payable, accrued expenses and accrued royalties	1,688	(2,013)
Deferred revenue	355	(333)
Other assets and liabilities	(1,910)	253
Net cash (used in) provided by operating activities	(6,966)	15,398
Cash flows from investing activities:
Investment in multi-client data library	(9,668)	(8,767)
Purchase of property, plant and equipment	(496)	(807)
Net cash used in investing activities	(10,164)	(9,574)
Cash flows from financing activities:
Borrowings under revolving line of credit	27,000	0
Payments on notes payable and long-term debt	(760)	(715)
Other financing activities	(10)	(239)
Net cash provided by (used in) financing activities	26,230	(954)
Effect of change in foreign currency exchange rates on cash, cash equivalents and restricted cash	470	81
Net increase in cash, cash equivalents and restricted cash	9,570	4,951
Cash, cash equivalents and restricted cash at beginning of period	33,118	33,854
Cash, cash equivalents and restricted cash at end of period	$ 42,688	$ 38,805