5. INTANGIBLE ASSETS (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Intellectual property and patents	$ 2,906,507	$ 2,848,300
Less: accumulated amortization	2,386,407	2,109,276
Intangible assets, net	$ 520,100	$ 739,024

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