ACQUISITION - Additional information (Details)	1 Months Ended	9 Months Ended
	Apr. 30, 2020 USD ($)	Sep. 30, 2020 USD ($) ft²	Dec. 31, 2019 USD ($)
Business Acquisition [Line Items]
Operating Lease, Right-of-Use Asset		$ 3,460,000	$ 3,859,000
Payments to Acquire Businesses, Gross		3,500,000
Gears Acquisition
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability		$ 64,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years
Period for payments of additional contingent consideration based upon sale of certain categories of acquired inventory		2 years
Payments to Acquire Businesses, Gross		$ 3,518,000
Hy-Tech [Member]
Business Acquisition [Line Items]
Payment made in exchange for early settlement of lease	$ 30,000
Gain on early settlement of lease obligation	$ 31,000
Hy-Tech [Member] | Gears Acquisition
Business Acquisition [Line Items]
Lease term		5 years
Area of land | ft²		42,000
Annual lease payments		$ 165,800