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CONSOLIDATED STATEMENT OF CASH FLOWS (UNAUDITED) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ (350) $ (2,318)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:    
Depreciation and amortization 516 620
Equipment transferred to cost of goods sold 121 186
Share-based compensation 961 1,096
Net change in:    
Trade accounts receivable (1,601) 18
Inventories (465) 11
Other current assets 800 (140)
Accounts payable and accrued liabilities 897 477
Deferred revenue 228 (352)
Other long-term liabilities (287) (1,014)
Deposits and other long-term assets 443 1,074
Net cash provided by (used in) operating activities 1,263 (342)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of property, plant and equipment (361) (654)
Cash provided by (used in) investing activities (361) (654)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Net proceeds from issuance of common stock, less payments for shares withheld to cover tax (424) (144)
Cash provided by (used in) financing activities (424) (144)
Increase (decrease) in cash and cash equivalents 478 (1,140)
Effects of exchange rate changes on cash (404) 186
Cash and cash equivalents at beginning of period 14,167 13,936
Cash and cash equivalents at end of period 14,241 12,982
Cash paid during the period for:    
Income taxes $ (463) $ 338