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Unaudited Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Cash flows from operating activities:    
Net income (loss) $ 6,928 $ (12,425)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization expense 46,209 51,469
Stock-based compensation expense 5,157 5,167
Amortization of deferred financing costs 1,344 1,416
Deferred income tax provision (benefit) (66) 1,295
Gains on disposals of assets (3,335) (1,538)
Settlement of disputes with seller of GEODynamics, Inc. 0 620
Other, net (614) 459
Changes in operating assets and liabilities, net of effect from acquired business:    
Accounts receivable 29,538 (27,745)
Inventories (23,754) (18,680)
Accounts payable and accrued liabilities (17,515) 8,873
Deferred revenue 5,580 7,496
Other operating assets and liabilities, net 2,905 2,586
Net cash flows provided by operating activities 52,377 18,993
Cash flows from investing activities:    
Capital expenditures (23,370) (13,263)
Proceeds from disposition of property and equipment 4,374 2,211
Acquisition of business, net of cash acquired 0 (8,125)
Other, net (120) (168)
Net cash flows used in investing activities (19,116) (19,345)
Cash flows from financing activities:    
Revolving credit facility borrowings 35,693 9,830
Revolving credit facility repayments (35,693) (9,830)
Repayment of 1.50% convertible senior notes (17,315) (6,272)
Payment of promissory note to seller of GEODynamics, Inc. 0 (10,000)
Other debt and finance lease repayments (340) (541)
Payment of financing costs (101) (81)
Purchases of treasury stock (3,001) 0
Shares added to treasury stock as a result of net share settlements due to vesting of stock awards (1,948) (1,002)
Net cash flows used in financing activities (22,705) (17,896)
Effect of exchange rate changes on cash and cash equivalents 330 (1,501)
Net change in cash and cash equivalents 10,886 (19,749)
Cash and cash equivalents, beginning of period 42,018 52,852
Cash and cash equivalents, end of period 52,904 33,103
Cash paid (received) for:    
Interest 4,353 4,605
Income taxes, net $ (34) $ (67)