Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 5,230	$ 10,478
Adjustments to reconcile net income to net cash used in operating activities:
Depreciation and amortization	2,923	2,217
Provision for bad debts - accounts receivable	639	359
Share-based compensation expense	1,212	832
Deferred income tax provision (benefit)	46	(1,145)
Change in fair value of acquisition-related contingent liabilities	406	1,199
Changes in assets and liabilities, net of acquisition of businesses:
Accounts receivable	760	(1,731)
Accounts receivable - other	(907)	(798)
Contract assets	(2,969)	(1,447)
Inventories	(8,713)	1,881
Prepaid expenses and other current assets	(1,897)	(331)
Other assets	(524)	(771)
Accounts payable and other current liabilities	(5,744)	(15,057)
Long-term pension liability	553	446
Other long-term liabilities	258	1,613
Net cash used in operating activities	(8,727)	(2,255)
CASH FLOWS FROM INVESTING ACTIVITIES
Additions to property, plant and equipment	(4,188)	(6,736)
Acquisition of businesses	(125)	(6,000)
Net cash used in investing activities	(4,313)	(12,736)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from borrowings of debt	62,858	72,359
Repayment of debt	(48,998)	(49,835)
Payment of cash dividends	(1,918)	(1,548)
Proceeds received on exercise of stock options	196	130
Tax withholdings on vesting of restricted shares and performance based shares	(232)	(372)
Tax benefit from vesting of acquisition-related restricted stock	0	171
Net cash provided by financing activities	11,906	20,905
Effect of currency exchange rates on cash	514	(175)
Net increase (decrease) in cash and cash equivalents	(620)	5,739
Cash and cash equivalents balance, beginning of period	8,935	5,172
Cash and cash equivalents balance, end of period	$ 8,315	$ 10,911