INTANGIBLE ASSETS (Schedule of intangible assets) (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Summary of finite lived Intangible assets
Intangible assets, Gross	$ 9,531,155	$ 9,514,418
Less: accumulated amortization	(9,300,032)	(9,251,599)
Intangible assets, net	231,123	262,819	$ 284,408
Core Technology [Member]
Summary of finite lived Intangible assets
Intangible assets, Gross	8,567,448	8,567,448
Trademarks And Patents [Member]
Summary of finite lived Intangible assets
Intangible assets, Gross	$ 963,707	$ 946,970