Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Cash Flows from Operating Activities
Net (loss) income	$ (1,758)	$ 5,118
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation expense	698	1,121
Restructuring	304	271
Stock-based compensation	222	215
Net pension payment	(210)	(211)
Deferred income taxes		(146)
Changes in assets and liabilities:
(Increase) decrease in accounts receivable and contract assets	(3,585)	3,089
Decrease (increase) in inventory	4	(53)
Increase in prepaid expenses, income tax receivable and other current assets	(1,224)	(11,242)
Decrease in accounts payable and accrued expenses	(164)	(355)
Increase (decrease) in other accrued expenses and liabilities	38	(1,781)
Net cash used in operating activities	(5,675)	(3,974)
Cash Flows from Investing Activities
Purchases of property, plant and equipment	(735)	(832)
Proceeds from sale of property, plant and equipment		196
Net cash used in investing activities	(735)	(636)
Cash Flows from Financing Activities
Debt financing costs	(113)	(129)
Payment of finance leases	(56)	(110)
Treasury stock activities	(30)
Net cash used in financing activities	(199)	(239)
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(458)	(558)
Net decrease in cash and cash equivalents and restricted cash	(7,067)	(5,407)
Cash and cash equivalents and restricted cash at beginning of period	33,562	34,122
Cash and cash equivalents and restricted cash at end of period	26,495	28,715
Supplemental disclosures
Cash paid for interest	99	186
Cash paid for income taxes, net of receipts	27	88
Non-cash investing and financing activities
Purchases of property, plant and equipment included in accounts payable	$ 1,919	$ 848