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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Cash flows from operating activities:    
Net loss $ (2,391) $ (5,228)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 2,634 3,434
Operating lease cost 255 262
Non-cash compensation 279 101
(Gain) loss on disposal of assets (10) 38
Remeasurement and other (23) 61
Change in operating assets and liabilities:    
(Increase) decrease in accounts receivable (9,851) 2,232
Decrease in prepaid expenses and other assets 78 1,627
Decrease in accounts payable (576) (171)
Increase (decrease) in accrued liabilities 47 (480)
Decrease in operating lease liabilities (247) (269)
Decrease in deferred revenue (855) (1,779)
Net cash used in operating activities (10,660) (172)
Cash flows from investing activities:    
Capital expenditures, net of non-cash capital expenditures summarized below (28)  
Proceeds from disposal of assets 10 94
Net cash (used in) provided by investing activities (18) 94
Cash flows from financing activities:    
Proceeds from notes payable   550
Principal payments on notes payable (328) (89)
Principal payments on finance leases (9) (13)
Tax withholdings related to stock-based compensation awards (79)  
Sale of treasury stock 113  
Net cash (used in) provided by financing activities (303) 448
Effect of exchange rate changes on cash and cash equivalents and restricted cash   46
Net (decrease) increase in cash and cash equivalents and restricted cash (10,981) 416
Cash and cash equivalents and restricted cash at beginning of period 30,376 45,955
Cash and cash equivalents and restricted cash at end of period 19,395 46,371
Supplemental cash flow information:    
Cash paid for interest 11 4
Non-cash operating, investing and financing activities:    
Increase in right-of-use assets and operating lease liabilities 527 $ 1
Financed insurance premiums $ 944