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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Cash flows from operating activities:    
Consolidated net income (loss) $ (1,805) $ 644
Adjustments to reconcile consolidated net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 2,869 2,266
Gain on loan forgiveness (580)  
Stock-based compensation 1,750 913
Deferred income taxes 88 (618)
Pension cost 507 791
Loss on disposal of property and equipment   48
Changes in operating assets and liabilities:    
Accounts receivable (1,872) (481)
Prepaid expenses and other current assets 487 (555)
Other assets 311 270
Accounts payable, accrued expenses and other 4,441 155
Accrued salaries, wages and related benefits 685 1,449
Income and other taxes (1,730) 778
Net cash provided by operating activities 5,151 5,660
Cash flows from investing activities:    
Capital expenditures (4,368) (1,414)
Proceeds from disposal of property and equipment   39
Net cash used in investing activities (4,368) (1,375)
Cash flows from financing activities:    
Proceeds from exercise of stock options 2,227 2,596
Withholding taxes on net settlement of stock-based compensation (763)  
Payment of long-term obligations (691) (864)
Proceeds from bank loan   580
Net cash provided by (used in) financing activities 773 2,312
Effect of exchange rate changes on cash and cash equivalents (227) 102
Net increase in cash and cash equivalents 1,329 6,699
Cash and cash equivalents, beginning of year 17,573 10,874
Cash and cash equivalents, end of year 18,902 17,573
Supplemental disclosures of cash flow information:    
Shares withheld for withholding taxes on net settlement for stock-based compensation 763  
Cash paid for income taxes 1,540 348
Cash paid for operating leases 1,789 2,286
Cash paid for interest $ 28 $ 141