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Consolidated statements of cash flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities    
Net income (loss) $ 3,712 $ (82,651)
Adjustments to reconcile net income (loss) to net cash used in operating activities:    
Depreciation expense 12,441 17,064
Amortization of intangible assets 24,537 25,112
Stock-based compensation expense 4,205 7,594
Inventory write downs 2,698 8,096
Provision for doubtful accounts 2,249 2,424
Deferred income taxes (130) 2,791
Loss on extinguishment of debt 0 5,290
Loss (gain) on sale-leaseback transactions (7,000) 0
Other 5,350 5,210
Changes in operating assets and liabilities    
Accounts receivable—trade (34,802) (44,959)
Inventories (34,611) 1,935
Prepaid expenses and other current assets 590 (8,078)
Cost and estimated profits in excess of billings (7,824) 84
Accounts payable, deferred revenue and other accrued liabilities 20,764 36,327
Billings in excess of costs and profits recognized (9,233) 7,986
Net cash used in operating activities (17,054) (15,775)
Cash flows from investing activities    
Capital expenditures for property and equipment (7,492) (2,399)
Proceeds from sale of property and equipment 3,007 7,007
Proceeds from settlement of note receivable 0 10,784
Acquisition of businesses, net of cash acquired (485) (3,411)
Proceeds from sale of business 0 (1,283)
Proceeds from sale-leaseback transactions 32,109 0
Net cash provided by investing activities 27,139 10,698
Cash flows from financing activities    
Borrowings on revolving Credit Facility 544,126 0
Repayments on revolving Credit Facility (544,126) (13,126)
Cash paid to repurchase 2025 Notes 0 (58,596)
Repurchases of stock (3,826) (1,414)
Payment of capital lease obligations (1,250) (1,517)
Deferred financing costs 0 (1,590)
Net cash used in financing activities (5,076) (76,243)
Effect of exchange rate changes on cash (838) (439)
Net increase (decrease) in cash, cash equivalents and restricted cash 4,171 (81,759)
Cash, cash equivalents and restricted cash at beginning of period 46,858 128,617
Cash, cash equivalents and restricted cash at end of period 51,029 46,858
Supplemental cash flow disclosures    
Cash paid for interest 25,325 27,068
Cash paid (refunded) for income taxes (383) 2,444
Noncash investing and financing activities    
Operating lease assets obtained in exchange for lease obligations 40,516 2,340
Finance lease assets obtained in exchange for lease obligations 2,026 463
Accrued purchases of property and equipment $ 50 $ 0