SUMMARY OF ACCOUNTING POLICIES - Operating lease liabilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Schedule Of Summary Of Accounting Policies [Line Items]
Property, Plant and Equipment, Cost Capitalization	1,000
Advertising Expense	$ 1,690,000	$ 1,375,000
Selling, General and Administrative Expense	21,869,000	21,705,000
Shipping and Handling [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Selling, General and Administrative Expense	$ 1,883,000	$ 2,370,000
Maximum [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life	20 years
Minimum [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Finite-Lived Intangible Asset, Useful Life	3 years
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	27.20%	32.60%
Sales Revenue, Segment [Member]
Schedule Of Summary Of Accounting Policies [Line Items]
Concentration Risk, Percentage	20.70%	26.50%