GOODWILL AND OTHER INTANGIBLE ASSETS - Other intangible assets - (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Other intangible assets:
Cost	$ 11,186,000	$ 10,833,000
Accumulated amortization	5,706,000	5,241,000
Net book value	$ 5,480,000	5,592,000
Acquired finite-lived intangible assets, weighted average useful life	15 years
Customer relationships
Other intangible assets:
Cost	$ 6,902,000	6,495,000
Accumulated amortization	3,942,000	3,545,000
Net book value	$ 2,960,000	$ 2,950,000
Acquired finite-lived intangible assets, weighted average useful life	6 years 1 month 6 days	6 years 8 months 12 days
Trademarks and trade names one
Other intangible assets:
Cost	$ 2,153,000	$ 2,187,000
Accumulated amortization	0	0
Net book value	$ 2,153,000	$ 2,187,000
Acquired finite-lived intangible assets, weighted average useful life	8 years 9 months 18 days	9 years 6 months
Trademarks and Trade Names Two
Other intangible assets:
Cost	$ 200,000	$ 200,000
Accumulated amortization	83,000	73,000
Net book value	117,000	127,000
Engineering drawings
Other intangible assets:
Cost	330,000	330,000
Accumulated amortization	265,000	254,000
Net book value	$ 65,000	$ 76,000
Acquired finite-lived intangible assets, weighted average useful life	4 years 4 months 24 days	5 years 1 month 6 days
Non-compete agreements
Other intangible assets:
Cost	$ 315,000	$ 335,000
Accumulated amortization	289,000	290,000
Net book value	$ 26,000	$ 45,000
Acquired finite-lived intangible assets, weighted average useful life	1 year 3 months 18 days	2 years
Patents
Other intangible assets:
Cost	$ 1,286,000	$ 1,286,000
Accumulated amortization	1,127,000	1,079,000
Net book value	$ 159,000	$ 207,000
Acquired finite-lived intangible assets, weighted average useful life	4 years 2 months 12 days	4 years 6 months