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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Operating activities    
Net loss $ (16,349) $ (9,711)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation and amortization 1,125 882
Equity-based compensation 3,866 7,195
Change in fair value of warranty liability 2,800 (6,387)
Realized and unrealized gain on marketable securities 16
Equity method investment loss 55
Asset retirement obligation accretion 15 12
Changes in operating assets and liabilities:    
Accounts receivable 979 1,704
Other current assets (46) 793
Other assets 27 (8)
Accounts payable (364) 646
Deferred revenue (34) (1,162)
Accrued expenses and other liabilities 395 (202)
Operating lease right-of-use assets and liabilities 88 141
Net cash used in operating activities (7,427) (6,097)
Investing activities    
Capitalization of costs and purchases of network assets, property, and equipment (856) (171)
Sale and maturity of marketable securities 5,213
Purchase of internal use software (341) (37)
Net cash provided by (used in) investing activities 4,016 (208)
Financing activities    
Payments towards debt (27)
Proceeds from exercise of stock options 26 26
Repurchase of common stocks (withholding taxes) (1)
Net cash (used in) provided by financing activities (1) 25
Effect of exchange rates on cash and cash equivalents (5) (15)
Net decrease in cash and cash equivalents (3,417) (6,295)
Cash and cash equivalents at beginning of period 47,230 100,076
Cash and cash equivalents at end of period 43,813 93,781
Non-cash financing information    
Capital expenditure included in accounts payable $ 591 $ 243