Condensed Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended		24 Months Ended
	Apr. 01, 2022	Apr. 02, 2021	Dec. 31, 2021	Dec. 31, 2020
Statement of Cash Flows [Abstract]
Net earnings	$ 4,028	$ 7,984
Adjustments to reconcile net earnings to net cash provided by (used in) operating activities:
Depreciation and amortization	8,832	9,209
Amortization of debt issuance costs	442	424
Accretion of convertible notes discount	0	738
Provision for doubtful accounts	135	173
Gain (Loss) on Disposition of Business	0	234
Net loss on sale of assets	60	10
Net loss on derivative instruments	449	590
Stock compensation expense	2,081	1,743
Deferred income taxes	(1,247)	1,793
Changes in assets and liabilities, excluding effects of acquisitions/divestitures:
Accounts receivable	4,307	50,254
Increase (Decrease) in Contract with Customer, Asset	12,973	(5,704)
Contract costs	144	(432)
Inventories	(17,285)	(13,655)
Income tax refunds receivable	(410)	418
Operating Right-of-Use Assets	915	799
Other assets	(2,249)	1,042
Accounts payable - trade	(612)	(14,707)
Contract liabilities	(137)	(5,439)
Operating Lease Liabilities	(899)	(908)
Payments for Retention Plans	0	(25,108)
Other current liabilities	(10,581)	(6,796)
Income taxes payable	53	1,173
Pension liabilities	(1,876)	(5,452)
Increase (Decrease) in Other Noncurrent Liabilities	(140)	(798)
Net cash provided by operating activities	(1,017)	(2,415)
Cash flows from investing activities:
Payments for (Proceeds from) Businesses and Interest in Affiliates	0	(3,428)
Expenditures for property, plant & equipment	(6,877)	(4,678)
Other, net	424	6
Net cash used in investing activities	(6,453)	(8,100)
Cash flows from financing activities:
Purchase of treasury shares	(575)	(344)
Dividends paid	(5,572)	(5,545)
Other, net	2,112	1,205
Net cash provided by (used in) financing activities	(4,035)	(4,684)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Excluding Exchange Rate Effect	(11,505)	(15,199)
Effect of Exchange Rate on Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	(198)	(166)
Cash and cash equivalents at beginning of period				$ 136,089
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	129,097		$ 140,800
Cash and cash equivalents and restricted cash at end of period	$ 129,097	$ 120,724	$ 140,800