6. INTANGIBLE ASSETS (Details) - USD ($)	Mar. 31, 2020	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Intellectual property and patents	$ 2,906,507	$ 2,906,507
Less: accumulated amortization	2,573,101	2,479,754
Intangible assets, net	$ 333,406	$ 426,753

Amount after accumulated amortization of finite-lived and indefinite-lived intangible assets classified as other.

No definition available.

Name:	us-gaap_OtherIntangibleAssetsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant