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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Cash flows from operating activities:    
Net loss $ (22,110) $ (5,347)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:    
Depreciation and amortization 10,083 13,412
Operating lease cost 796 916
Non-cash compensation 312 600
Deferred income tax expense   79
Change in other long-term liabilities   (150)
Gain on disposal of assets (131) (3)
Remeasurement and other 20 68
Change in operating assets and liabilities:    
Decrease in accounts receivable 7,037 19,373
Decrease in prepaid expenses and other assets 2,194 4,505
Decrease in accounts payable (365) (2,957)
Decrease in accrued liabilities (696) (2,011)
Decrease in operating lease liabilities (830) (930)
Decrease in deferred revenue (1,683) (3,107)
Net cash (used in) provided by operating activities (5,373) 24,448
Cash flows from investing activities:    
Capital expenditures, net of non-cash capital expenditures summarized below (11) (2,822)
Proceeds from maturity of short-term investments   1,767
Proceeds from disposal of assets 384 225
Proceeds from notes receivable   26
Net cash provided by (used in) investing activities 373 (804)
Cash flows from financing activities:    
Proceeds from notes payable 550 6,374
Principal payments on notes payable (387) (8,393)
Principal payments on finance leases (46) (2,291)
Tax withholdings related to stock-based compensation awards (75) (70)
Net cash provided by (used in) financing activities 42 (4,380)
Effect of exchange rate changes on cash and cash equivalents and restricted cash 21 (113)
Net (decrease) increase in cash and cash equivalents and restricted cash (4,937) 19,151
Cash and cash equivalents and restricted cash at beginning of period 45,955 31,271
Cash and cash equivalents and restricted cash at end of period 41,018 50,422
Supplemental cash flow information:    
Cash paid for interest 16 89
Cash paid for income taxes 81 83
Cash received for income taxes   206
Non-cash operating, investing and financing activities:    
Increase (decrease) in accrued purchases of property and equipment 318 (61)
Increase in right-of-use assets and operating lease liabilities $ 1 63
Increase in right-of-use assets for prepaid rent   3
Financed insurance premiums   $ 433