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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    
Net income (loss) $ 14,971 $ (1,694)
Adjustments to reconcile net income (loss) to net cash used in operating activities    
Depreciation expense 2,559 3,615
Restructuring 913 3,195
Stock-based compensation 1,469 764
Gain from extinguishment of debt (Paycheck Protection Program Term Note) (10,000) 0
Net pension (payment) cost (717) (7,134)
Deferred income taxes 0 (244)
Changes in assets and liabilities, net of dispositions:    
(Increase) decrease in accounts receivable, net and contract assets (9,175) (931)
(Increase) decrease in prepaid expenses, income tax receivable and other current assets 925 (3,469)
Decrease in accounts payable and accrued expense (395) (997)
Decrease in other accrued expenses and liabilities (2,313) (945)
Net cash used in operating activities (1,763) (7,840)
Cash Flows from Investing Activities    
Purchases of property, plant and equipment (3,046) (2,699)
Proceeds from the sale of property, plant and equipment 146 1,924
Net cash used in investing activities (2,900) (775)
Cash Flows from Financing Activities    
Borrowings 5,000 10,000
Repayment of borrowings (17,100) (1,600)
Debt financing costs (795) (653)
Payment of finance leases (227) (412)
Treasury stock activities (291) (22)
Net cash (used in) provided by financing activities (13,413) 7,313
Effect of exchange rate changes on cash, cash equivalents and restricted cash (353) 742
Net decrease in cash and cash equivalents and restricted cash (18,429) (560)
Cash and cash equivalents and restricted cash at beginning of year 33,562 34,122
Cash and cash equivalents and restricted cash at end of year 15,133 33,562
Supplemental disclosures    
Cash paid for interest 490 652
Cash received for income taxes, net of payments 1,323 9,216
Non-cash investing and financing activities    
Purchases of property, plant and equipment included in accounts payable and accrued expense $ 2,715 $ 1,965