Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands		9 Months Ended
		Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net loss		$ (31,220)	$ (23,921)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization (other than multi-client library)		3,277	2,936
Amortization of multi-client data library		21,970	16,674
Impairment of multi-client data library		0	1,167
Impairment of goodwill		0	4,150
Stock-based compensation expense		1,306	1,637
Amortization of government relief funding		0	(6,923)
Loss on restructuring transactions		4,696	0
Deferred income taxes		0	237
Change in operating assets and liabilities:
Accounts receivable		(7,880)	21,065
Unbilled receivables		(6,291)	1,181
Inventories		397	77
Accounts payable, accrued expenses and accrued royalties		(2,787)	(6,429)
Deferred revenue		(619)	(2,246)
Other assets and liabilities		7,195	3,563
Net cash provided by (used in) operating activities		(9,956)	13,168
Cash flows from investing activities:
Investment in multi-client data library		(22,307)	(19,841)
Purchase of property, plant and equipment		(2,038)	(865)
Net cash used in investing activities		(24,345)	(20,706)
Cash flows from financing activities:
Borrowings under revolving line of credit		0	27,000
Repayments under revolving line of credit		(3,150)	(4,500)
Proceeds from the rights offering	[1]	41,836	0
Payments on notes payable and long-term debt	[2]	(18,704)	(1,814)
Costs associated with debt issuance	[3]	(8,185)	0
Net proceeds from the registered direct offering		9,802	0
Receipt of Paycheck Protection Program loan		0	6,923
Other financing activities		(603)	(308)
Net cash provided by financing activities		20,996	27,301
Effect of change in foreign currency exchange rates on cash, cash equivalents and restricted cash		(65)	501
Net increase (decrease) in cash, cash equivalents and restricted cash		(13,370)	20,264
Cash, cash equivalents and restricted cash at beginning of period		39,813	33,118
Cash, cash equivalents and restricted cash at end of period (see Footnote 12)		$ 26,443	$ 53,382

[1] Represents $30.1 million in New Notes and $11.7 million of ION common stock issued in connection with the Rights Offering described in the footnotes.

[2] Consists primarily of $17.1 million payment for the Old Notes resulting from the Exchange Offer.

[3] Represents transaction costs incurred in connection with the Restructuring Transactions.