ACQUISITION - Additional information (Details) - USD ($)		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross		$ 3,518,000	$ 0
Business Combination, Contingent Consideration, Liability, Current	$ 0	0	$ 1,000,000
Gears Acquisition
Business Acquisition [Line Items]
Business Combination, Contingent Consideration, Liability	$ 64,000	$ 64,000
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life		15 years
Payments to Acquire Businesses, Gross		$ 3,518,000
Maximum Fixed Charge Coverage Ratio Rate	17.50%