ACQUISITIONS (Details)										12 Months Ended
	Jun. 17, 2022 USD ($) $ / shares shares	May 30, 2022 USD ($) shares	May 27, 2022 $ / shares shares	Dec. 30, 2021 USD ($) $ / shares	Dec. 30, 2021 USD ($) $ / shares	Dec. 30, 2021 USD ($) $ / shares shares	Dec. 30, 2021 USD ($) payment $ / shares	Dec. 30, 2021 USD ($) instrument $ / shares	Nov. 04, 2021 USD ($) $ / shares shares	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	May 24, 2022	Nov. 02, 2021
ACQUISITIONS
Increase (decrease) in goodwill										$ 291,000
Cash paid for acquisition										44,101,000	$ 47,254,000	$ 14,728,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Goodwill										126,366,000	106,633,000	61,860,000
Revenues										502,988,000	403,516,000	366,694,000
Earnings										17,389,000	24,094,000	13,643,000
Amortization of intangible assets										11,169,000	6,245,000	5,928,000
Pro forma Condensed Combined Financial Information
Revenues										513,803,000	470,589,000	415,577,000
Income before income taxes										28,032,000	22,883,000	$ 17,633,000
FPH Group
ACQUISITIONS
Business acquisition percentage of voting interests acquired		100.00%
Purchase price		$ 42,159,000
Transaction costs related to acquisition		1,057,000
Adjustments to purchase price		1,119,000
Decrease in trade receivables		61,000
Increase (decrease) in goodwill		1,170,000
Increase in other current liabilities		621,000
Increase of deferred income tax		1,607,000
Cash paid for acquisition		39,359,000
Shares issued for acquisition		550,000
Number of share issued for consideration | shares			22,886
Stock price | $ / shares			$ 24.01
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Cash and cash equivalents		1,755,000
Trade receivables		3,100,000
Inventories		4,576,000
Other assets, net		174,000
Property, plant and equipment		624,000
Right of use assets		4,165,000
Intangible assets		22,611,000
Goodwill		14,484,000
Other current liabilities		(1,577,000)
Deferred revenue		(776,000)
Lease liabilities		(4,165,000)
Net deferred income tax liabilities		(3,931,000)
Net purchase price		$ 41,040,000
Revenues										12,113,000
Earnings										607,000
Amortization of intangible assets										1,426,000
Number of shares issued in exchange		1
FPH Group | Technology
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets		$ 5,731,000
Estimated Life		10 years
FPH Group | Customer lists
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets		$ 16,173,000
Estimated Life		12 years
FPH Group | Trade name
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets		$ 707,000
Estimated Life		10 years
FPH Group | Exchangeable Shares
ACQUISITIONS
Shares issued for acquisition		$ 2,250,000
Number of share issued for consideration | shares		93,728
ThinGap and Airex
ACQUISITIONS
Purchase price	$ 16,527,000
Adjustments to purchase price	91,000
Increase (decrease) in goodwill	272,000
Increase in deferred revenue	181,000
Cash paid for acquisition	8,224,000
Shares issued for acquisition	$ 8,303,000
Number of share issued for consideration | shares	376,500
Shares subject to indemnification holdback | shares	29,631
Stock price | $ / shares	$ 22.05
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Cash and cash equivalents	$ 1,074,000
Trade receivables	1,295,000
Inventories	1,686,000
Other assets, net	636,000
Property, plant and equipment	202,000
Right of use assets	888,000
Intangible assets	6,000,000
Goodwill	7,072,000
Other current liabilities	(574,000)
Deferred revenue	(426,000)
Lease liabilities	(888,000)
Net deferred income tax liabilities	(347,000)
Net purchase price	16,618,000
Revenues										4,217,000
Earnings										337,000
Amortization of intangible assets										653,000
ThinGap and Airex | Business development
ACQUISITIONS
Transaction costs related to acquisition	257,000
ThinGap and Airex | Technology
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets	$ 2,000,000
Estimated Life	12 years 6 months
ThinGap and Airex | Customer lists
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets	$ 3,800,000
Estimated Life	10 years
ThinGap and Airex | Trade name
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets	$ 200,000
Estimated Life	10 years
ThinGap
ACQUISITIONS
Business acquisition percentage of voting interests acquired													100.00%
Airex LLC
ACQUISITIONS
Business acquisition percentage of voting interests acquired	100.00%
ORMEC
ACQUISITIONS
Business acquisition percentage of voting interests acquired														100.00%
ALIO
ACQUISITIONS
Business acquisition percentage of voting interests acquired									100.00%
ORMEC and ALIO
ACQUISITIONS
Purchase price									$ 33,458,000
Transaction costs related to acquisition										130,000	409,000
Reduction in consideration										800,000
Cash paid for acquisition									23,333,000
Shares issued for acquisition									$ 5,526,000
Number of share issued for consideration | shares									150,038
Stock price | $ / shares									$ 36.83
Fair value of contingent consideration									$ 4,900,000	4,100,000
Estimated working capital provision									301,000
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Cash and cash equivalents									2,059,000
Trade receivables									1,416,000
Inventories									2,802,000
Other assets, net									88,000
Property, plant and equipment									669,000
Right of use assets									1,005,000
Intangible assets									10,200,000
Goodwill									20,114,000
Other current liabilities									(1,028,000)
Deferred revenue									(2,063,000)
Lease liabilities									(1,005,000)
Net deferred income tax liabilities									(662,000)
Net purchase price									33,595,000
Revenues									2,063,000
ORMEC and ALIO | Technology
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets									$ 4,000,000
Estimated Life									6 years
ORMEC and ALIO | Customer lists
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets									$ 5,700,000
Estimated Life									11 years
ORMEC and ALIO | Trade name
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets									$ 500,000
Estimated Life									10 years
Spectrum Controls
ACQUISITIONS
Purchase price				$ 68,711,000
Transaction costs related to acquisition										191,000	93,000
Cash paid for acquisition				26,076,000
Shares issued for acquisition				$ 17,970,000
Number of share issued for consideration | shares						502,512
Stock price | $ / shares				$ 35.76	$ 35.76	$ 35.76	$ 35.76	$ 35.76
Consideration remaining payable				$ 24,665,000	$ 24,665,000	$ 24,665,000	$ 24,665,000	$ 24,665,000
Consideration in cash and stock at closing of business combination				44,046,000
Number of remaining payments							2	2
Amount payable at each payment				$ 12,500,000
Percentage of remaining consideration in cash					50.00%
Percentage of remaining consideration in stock					50.00%
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Cash and cash equivalents											96,000
Trade receivables											3,612,000
Inventories											4,052,000
Other assets, net											560,000
Property, plant and equipment											278,000
Intangible assets											34,800,000
Goodwill											26,608,000
Current liabilities											(1,267,000)
Net purchase price											68,739,000
Spectrum Controls | Accrued liabilities.
ACQUISITIONS
Consideration remaining payable										12,500,000
Spectrum Controls | Other long-term liabilities
ACQUISITIONS
Consideration remaining payable										$ 12,277,000
Spectrum Controls | Technology
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets											$ 13,500,000
Estimated Life											10 years
Spectrum Controls | Customer lists
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets											$ 21,000,000
Estimated Life											18 years
Spectrum Controls | Trade name
Business Combination, Recognized Identifiable Assets Acquired, Goodwill, and Liabilities Assumed, Net [Abstract]
Intangible assets											$ 300,000
Estimated Life											10 years