CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 42,663	$ 33,065	$ 38,407
Accounts receivable, net	51,149	29,548
Unbilled receivables	8,356	11,815
Inventories, net	12,820	12,187
Prepaid expenses and other current assets	5,681	6,012
Total current assets	120,669	92,627
Deferred income tax asset, net	7,905	8,734
Property, plant and equipment, net	12,706	13,188
Multi-client data library, net	54,344	60,384
Goodwill	18,298	23,585		$ 22,915
Right-of-use assets	42,166	32,546
Other assets	3,299	2,130
Total assets	259,387	233,194
Current liabilities:
Current maturities of long-term debt	28,646	2,107
Accounts payable	43,827	49,316
Accrued expenses	29,078	30,328
Accrued multi-client data library royalties	21,424	18,831
Deferred revenue	4,882	4,551
Current maturities of operating lease liabilities	9,873	11,055
Total current liabilities	137,730	116,188
Long-term debt, net of current maturities	119,296	119,352
Operating lease liabilities, net of current maturities	40,531	30,833
Other long-term liabilities	433	1,453
Total liabilities	297,990	267,826
Deficit:
Common stock, $0.01 par value; authorized 26,666,667 shares; outstanding 14,240,126 and 14,224,787 shares at March 31, 2020 and December 31, 2019, respectively.	142	142
Additional paid-in capital	957,254	956,647
Accumulated deficit	(976,554)	(974,291)
Accumulated other comprehensive loss	(21,099)	(19,318)
Total stockholders’ deficit	(40,257)	(36,820)
Noncontrolling interest	1,654	2,188
Total deficit	(38,603)	(34,632)	$ (11,439)	$ 7,824
Total liabilities and deficit	$ 259,387	$ 233,194