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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Cash flows from operating activities:    
Net income (loss) $ 113 $ (457)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 293 251
Stock-based compensation expense 26 75
Amortization of right-of-use assets 213 192
Changes in operating assets and liabilities:    
Accounts receivable (383) 50
Inventories 99 144
Prepaid expenses and other assets (62) (27)
Accounts payable (31) (86)
Accrued liabilities 32 5
Accrued income taxes 47 (26)
Deferred taxes (91) 43
Lease liabilities (204) (175)
Deferred revenue (13) 13
Net cash provided by operating activities 39 2
Cash flows from investing activities:    
Property, plant and equipment (7) (141)
Intangible assets (83) (92)
Net cash used in investing activities (90) (233)
Cash flows from financing activities:    
Proceeds from PPP loan 186  
Share repurchase   (6)
Net cash provided by financing activities 186 (6)
Effect of exchange rate changes on cash 146 (26)
Net increase (decrease) in cash, cash equivalents, and restricted cash 281 (263)
Cash, cash equivalents and restricted cash, beginning of period 5,844 6,107
Cash, cash equivalents and restricted cash, end of period 6,125 5,844
Reconciliation of cash, cash equivalents and restricted cash, end of period:    
Cash, cash equivalents and restricted cash, end of period 6,125 5,844
Supplemental disclosure of cash flow information:    
Income taxes paid 137 247
Supplemental non-cash investing and financing activities:    
Lease liabilities arising from obtaining right-of-use assets $ 334 $ 395