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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Cash flows from operating activities:    
Consolidated net loss $ (12,005) $ (1,805)
Adjustments to reconcile consolidated net loss to net cash    
Depreciation and amortization 3,889 2,869
Gain on loan forgiveness   (580)
Stock-based compensation 3,283 1,750
Deferred income taxes 217 88
Provision for doubtful accounts 480  
Pension cost 943 507
Loss on lease termination 125  
Changes in operating assets and liabilities:    
Accounts receivable 1,303 (1,872)
Prepaid expenses and other current assets (226) 487
Other assets 750 311
Accounts payable, accrued expenses and other 322 4,441
Accrued salaries, wages and related benefits (310) 685
Income and other taxes 13 (1,730)
Net cash provided by (used in) operating activities (1,216) 5,151
Cash flows from investing activities:    
Capital expenditures (6,526) (4,368)
Purchase of short term investments - others (507)  
Net cash used in investing activities (7,033) (4,368)
Cash flows from financing activities:    
Proceeds from exercise of stock options 332 2,227
Withholding taxes on net settlement of stock-based compensation   (763)
Payment of long-term obligations (639) (691)
Net cash provided by (used in) financing activities (307) 773
Effect of exchange rate changes on cash and cash equivalents (554) (227)
Net increase (decrease) in cash and cash equivalents (9,110) 1,329
Cash and cash equivalents, beginning of year 18,902 17,573
Cash and cash equivalents, end of year 9,792 18,902
Supplemental disclosures of cash flow information:    
Cash paid for income taxes 1,107 1,540
Cash paid for operating leases 1,838 1,789
Cash paid for interest $ 19 $ 28