SUMMARY OF ACCOUNTING POLICIES - Operating lease liabilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Summary Of Accounting Policies [Line Items]
Selling, General and Administrative Expense	$ 19,367,000	$ 21,869,000
Property, Plant and Equipment, Cost Capitalization	1,000
Advertising Expense	$ 1,529,000	$ 1,690,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	164,000	55,000
Shipping and Handling [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Selling, General and Administrative Expense	$ 1,831,000	$ 1,883,000
Maximum [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years
Liability period	3 years
Minimum [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
Liability period	1 year
Machinery and Equipment [Member] | Maximum [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	10 years
Machinery and Equipment [Member] | Minimum [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Building [Member] | Maximum [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	31 years
Building [Member] | Minimum [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Property, Plant and Equipment, Useful Life	27 years 6 months
Accounts Receivable [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Concentration Risk, Percentage	38.00%	27.20%
Sales Revenue, Segment [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Concentration Risk, Percentage	26.30%	20.70%