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CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net income (loss) $ 342 $ (1,630)
Adjustments to reconcile net income (loss)    
Depreciation and amortization 468 441
Equipment transferred to cost of goods sold 139 317
Share-based compensation 929 934
Net change in:    
Trade accounts receivable 25 (619)
Inventories 241 (1,031)
Other current assets 35 78
Accounts payable and accrued liabilities (329) (248)
Deferred revenue (318) 438
Other long-term liabilities (515) (731)
Deposits and other long-term assets 444 511
Net cash provided by (used in) operating activities 1,461 (1,540)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchases of property, plant and equipment (490) (794)
Cash provided by (used in) investing activities (490) (794)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Net proceeds from issuance of common stock, less payments for shares withheld to cover tax (354) (165)
Cash provided by (used in) financing activities (354) (165)
Increase (decrease) in cash and cash equivalents 617 (2,499)
Effects of exchange rate changes on cash (260) (650)
Cash and cash equivalents at beginning of period 11,510 14,190
Cash and cash equivalents at end of period 11,867 11,041
Cash paid during the period for:    
Income taxes $ 189 $ 516