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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Cash flows from operating activities    
Net income (loss) $ 16,542 $ (63,056)
Adjustments to reconcile net income (loss) to net cash used in operating activities:    
Depreciation expense 9,678 13,159
Amortization of intangible assets 18,487 18,896
Inventory write down 1,580 4,019
Stock-based compensation expense 3,537 5,691
Loss on extinguishment of debt 0 5,290
Deferred income taxes (1,870) (473)
Noncash losses and other, net 5,480 5,567
Changes in operating assets and liabilities    
Accounts receivable—trade (28,729) (38,215)
Inventories (37,160) 13,089
Prepaid expenses and other assets 1,408 (8,264)
Cost and estimated profit in excess of billings (10,251) (3,469)
Accounts payable, deferred revenue and other accrued liabilities (2,022) 35,919
Billings in excess of costs and estimated profits earned (8,812) 3,747
Net cash used in operating activities (32,132) (8,100)
Cash flows from investing activities    
Capital expenditures for property and equipment (4,779) (999)
Proceeds from sale of property and equipment 2,672 6,826
Payments related to business acquisitions and dispositions (485) (1,283)
Net cash provided by (used in) investing activities (2,592) 4,544
Cash flows from financing activities    
Borrowings on Credit Facility 423,945 0
Repayments on Credit Facility (413,205) (13,126)
Cash paid to repurchase 2025 Notes 0 (58,596)
Payment of capital lease obligations (746) (1,023)
Repurchases of stock (826) (349)
Deferred financing costs 0 (1,464)
Net cash provided by (used in) financing activities 9,168 (74,558)
Effect of exchange rate changes on cash (1,524) (459)
Net decrease in cash, cash equivalents and restricted cash (27,080) (78,573)
Cash, cash equivalents and restricted cash at beginning of period 46,858 128,617
Cash, cash equivalents and restricted cash at end of period 19,778 50,044
Noncash activities    
Operating lease right of use assets obtained in exchange for lease obligations 3,248 1,055
Finance lease right of use assets obtained in exchange for lease obligations $ 458 $ 228