Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020
Cash flows from operating activities:
Net earnings	$ 16,813	$ 9,244
Adjustments to reconcile net earnings to net cash (used in) provided by operating activities:
Depreciation and amortization	12,514	12,322
Stock-based compensation	1,752	1,780
Amortization of deferred financing costs	1,267	485
Deferred income taxes	(124)	(1,821)
Net unrealized (gains) losses on foreign currency revaluation	(373)	1,066
Gains on sale of property	(6,578)	(32)
Other, net	1,355	735
Changes in operating assets and liabilities:
Accounts receivable, net	(11,893)	6,517
Unbilled receivables	(13,958)	(3,065)
Inventories	(22,831)	4,419
Accounts payable	15,800	(4,597)
Accrued expenses	9,066	3,694
Other operating assets/liabilities, net	(4,524)	4,022
Net cash (used in) provided by operating activities	(1,714)	34,769
Cash flows from investing activities:
Purchases of property, plant and equipment	(4,154)	(4,501)
Payments for acquisitions, net of cash acquired	(16,811)	0
Proceeds from disposal/sale of property, plant and equipment	7,249	54
Net cash used in investing activities	(13,716)	(4,447)
Cash flows from financing activities:
Dividends paid to common stockholders	(2,447)	(2,422)
Deferred financing costs	(675)	(600)
Borrowings under revolving credit line	115,000	0
Repayments of revolving credit line	(14,500)	(10,000)
Repayments of long-term debt	(104,846)	(8,179)
Net cash used in financing activities	(7,468)	(21,201)
Effect of exchange rate changes on cash and cash equivalents	(80)	(281)
Net (decrease) increase in cash and cash equivalents	(22,978)	8,840
Cash and cash equivalents - beginning of period	84,939	72,289
Cash and cash equivalents - end of period	61,961	81,129
Supplementary information:
Income taxes, net of refunds received	2,024	1,571
Interest payments	1,683	3,408
Goodwill	25,846
Cash paid for acquisitions, net of cash acquired	16,811	(0)
RMS and EOS Acquisitions [Member]
Supplementary information:
Fair value of identifiable net assets acquired	18,055	0
Goodwill	2,659	0
Fair value of net assets acquired	20,714	0
Fair value of consideration transferred	20,714	0
Less: Cash acquired in acquisitions	$ (3,903)	$ 0