Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Cash Flows from Operating Activities
Net income	$ 4,461	$ 10,569	$ 7,806	$ 8,811
Adjustments to reconcile net income to net cash provided by (used in) operating activities:
Depreciation expense			1,184	1,361
Restructuring			0	309
Stock-based compensation			850	762
Gain from extinguishment of debt (Paycheck Protection Program Term Note)	0	(10,000)	0	(10,000)
Net pension payment			(365)	(596)
Changes in assets and liabilities:
Increase in accounts receivable and contract assets			(581)	(5,932)
Decrease (increase) in prepaid expenses, income tax receivable and other current assets			526	(590)
Increase in accounts payable and accrued expenses			1,510	653
(Decrease) increase in other accrued expenses and liabilities			(1,068)	508
Net cash provided by (used in) operating activities			9,862	(4,714)
Cash Flows from Investing Activities
Purchases of property, plant and equipment			(3,616)	(984)
Proceeds from sale of property, plant and equipment			57	101
Net cash used in investing activities			(3,559)	(883)
Cash Flows from Financing Activities
Borrowings			5,000	0
Repayment of borrowings			0	(4,000)
Debt financing costs			(123)	(301)
Payment of finance leases			(101)	(112)
Treasury stock activities			(268)	(118)
Net cash provided by (used in) financing activities			4,508	(4,531)
Effect of exchange rate changes on cash, cash equivalents and restricted cash			(3,111)	(462)
Net increase (decrease) in cash and cash equivalents and restricted cash			7,700	(10,590)
Cash and cash equivalents and restricted cash at beginning of period			15,133	33,562
Cash and cash equivalents and restricted cash at end of period	22,833	22,972	22,833	22,972
Supplemental disclosures
Cash paid for interest			186	264
Cash paid for income taxes, net			478	959
Non-cash investing and financing activities
Purchases of property, plant and equipment included in accounts payable			2,576	1,322
Cash and cash equivalents	10,570	11,911	10,570	11,911
Restricted cash	2,337	3,222	2,337	3,222
Cash held in Escrow account included in other current assets (see Note E)	9,926	0	9,926	0
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Disposal Group, Including Discontinued Operations	$ 22,833	$ 22,972	$ 22,833	$ 22,972