Segment and Geographic Information (Details) - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2022	Apr. 02, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 158,048	$ 171,616
Operating Income (Loss)	$ 3,057	$ 5,613
Revenue, Net, Percentage	100.00%	100.00%
Research and Development Expense	$ 5,113	$ 4,226
Military and Defense, other than fuzes [Member]
Disaggregation of Revenue [Line Items]
Net sales	31,230	43,611
Missile and Bomb Fuzes [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 37,322	$ 41,586
Revenue, Net, Percentage	24.00%	24.00%
Commercial Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 46,958	$ 47,958
Medical [Member]
Disaggregation of Revenue [Line Items]
Net sales	23,128	20,583
Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 19,410	$ 17,878
Original Equipment Manufacturer [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net, Percentage	61.00%	63.00%
Aftermarket [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net, Percentage	15.00%	13.00%
Engineered Products
Disaggregation of Revenue [Line Items]
Net sales	$ 81,452	$ 71,779
Operating Income (Loss)	$ 11,042	$ 4,906
Revenue, Net, Percentage	52.00%	42.00%
Research and Development Expense	$ 2,243	$ 2,822
Engineered Products | Military and Defense, other than fuzes [Member]
Disaggregation of Revenue [Line Items]
Net sales	9,653	11,228
Engineered Products | Missile and Bomb Fuzes [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0
Revenue, Net, Percentage	0.00%	0.00%
Engineered Products | Commercial Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 32,378	$ 25,072
Engineered Products | Medical [Member]
Disaggregation of Revenue [Line Items]
Net sales	21,149	18,652
Engineered Products | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 18,272	$ 16,827
Engineered Products | Original Equipment Manufacturer [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net, Percentage	41.00%	32.00%
Engineered Products | Aftermarket [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net, Percentage	11.00%	10.00%
Precision Products
Disaggregation of Revenue [Line Items]
Net sales	$ 47,549	$ 60,533
Operating Income (Loss)	$ 3,409	$ 13,053
Revenue, Net, Percentage	30.00%	35.00%
Research and Development Expense	$ 2,803	$ 1,402
Precision Products | Military and Defense, other than fuzes [Member]
Disaggregation of Revenue [Line Items]
Net sales	5,322	6,994
Precision Products | Missile and Bomb Fuzes [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 37,322	$ 41,586
Revenue, Net, Percentage	24.00%	24.00%
Precision Products | Commercial Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 3,767	$ 10,902
Precision Products | Medical [Member]
Disaggregation of Revenue [Line Items]
Net sales	0	0
Precision Products | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 1,138	$ 1,051
Precision Products | Original Equipment Manufacturer [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net, Percentage	2.00%	8.00%
Precision Products | Aftermarket [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net, Percentage	4.00%	3.00%
Structures
Disaggregation of Revenue [Line Items]
Net sales	$ 29,047	$ 39,304
Operating Income (Loss)	$ (617)	$ 320
Revenue, Net, Percentage	18.00%	23.00%
Research and Development Expense	$ 67	$ 2
Structures | Military and Defense, other than fuzes [Member]
Disaggregation of Revenue [Line Items]
Net sales	16,255	25,389
Structures | Missile and Bomb Fuzes [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0
Revenue, Net, Percentage	0.00%	0.00%
Structures | Commercial Aerospace [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 10,813	$ 11,984
Structures | Medical [Member]
Disaggregation of Revenue [Line Items]
Net sales	1,979	1,931
Structures | Other [Member]
Disaggregation of Revenue [Line Items]
Net sales	$ 0	$ 0
Structures | Original Equipment Manufacturer [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net, Percentage	18.00%	23.00%
Structures | Aftermarket [Member]
Disaggregation of Revenue [Line Items]
Revenue, Net, Percentage	0.00%	0.00%
Corporate Segment
Disaggregation of Revenue [Line Items]
Operating Income (Loss)	$ (10,548)	$ (10,365)
Other unallocated expenses, net
Disaggregation of Revenue [Line Items]
Operating Income (Loss)	$ (229)	$ (2,301)