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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Cash flows from operating activities:    
Consolidated net income (loss) $ 409 $ (280)
Adjustments to reconcile consolidated net income (loss) to net cash provided by operating activities:    
Depreciation and amortization 697 630
Stock-based compensation 278 170
Deferred income taxes (45) (71)
Pension cost 142 200
Changes in operating assets and liabilities:    
Accounts receivable (448) (92)
Prepaid expenses and other current assets 223 (449)
Other assets 52 (336)
Accounts payable and accrued expenses 956 662
Accrued salaries, wages and related benefits (789) (53)
Income and other taxes (718) 369
Net cash provided by operating activities 757 750
Cash flows from investing activities:    
Capital expenditures (503) (578)
Net cash used in investing activities (503) (578)
Cash flows from financing activities:    
Proceeds from stock option exercises 609  
Withholding taxes on stock-based compensation (764)  
Payment of long-term obligations (268) (104)
Net cash used in financing activities (423) (104)
Effect of exchange rate changes on cash and cash equivalents (108) (197)
Net decrease in cash and cash equivalents (277) (129)
Cash and cash equivalents, beginning of period 17,573 10,874
Cash and cash equivalents, end of period 17,296 10,745
Supplemental disclosures of cash flow information:    
Shares withheld for withholding taxes on net settlement for stock-based compensation 763  
Cash paid for income taxes 571  
Cash paid for operating leases 437 615
Cash paid for interest $ 11 $ 44