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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 6 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Cash flows from operating activities:    
Net (loss) income $ (14,245) $ 2,493
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities:    
Depreciation and amortization 6,834 9,287
Operating lease cost 528 605
Non-cash compensation 198 474
Deferred income tax expense   79
Change in other long-term liabilities   (150)
(Gain) loss on disposal of assets (82) 1
Remeasurement and other 121 (14)
Change in operating assets and liabilities:    
Decrease (increase) in accounts receivable 7,038 (2,249)
Decrease in prepaid expenses and other assets 1,927 3,304
Decrease in accounts payable (1,063) (600)
Decrease in accrued liabilities (911) (1,319)
Decrease in operating lease liabilities (548) (613)
Decrease in deferred revenue (1,095) (2,322)
Net cash (used in) provided by operating activities (1,298) 8,976
Cash flows from investing activities:    
Capital expenditures, net of non-cash capital expenditures summarized below   (2,764)
Proceeds from disposal of assets 335 193
Proceeds from notes receivable   26
Net cash provided by (used in) investing activities 335 (2,545)
Cash flows from financing activities:    
Proceeds from notes payable 550 6,374
Principal payments on notes payable (237) (7,842)
Principal payments on finance leases (27) (1,474)
Tax withholdings related to stock-based compensation awards (75) (17)
Net cash provided by (used in) financing activities 211 (2,959)
Effect of exchange rate changes on cash and cash equivalents and restricted cash 131 (265)
Net (decrease) increase in cash and cash equivalents and restricted cash (621) 3,207
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 45,334 34,478
Supplemental cash flow information:    
Cash paid for interest 11 77
Cash paid for income taxes 81  
Cash received for income taxes   206
Non-cash operating, investing and financing activities:    
Decrease in accrued purchases of property and equipment   (61)
Increase in right-of-use assets and operating lease liabilities $ 1  
Financed insurance premiums   $ 434