INCOME TAXES, Tax Credits and Net Operating Loss Carryforwards (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2016
Income Tax Credit Carryforward [Abstract]
Federal income tax credits	$ 313,000	$ 884,000
Earliest Tax Year [Member]
Income Tax Credit Carryforward [Abstract]
Federal income tax credits	$ 289,000
Federal income tax credit expiration date	Dec. 31, 2019
Latest Tax Year [Member]
Income Tax Credit Carryforward [Abstract]
Federal income tax credit expiration date	Dec. 31, 2021
Federal [Member]
Income Taxes Operating Loss Carryforwards[Abstract]
Operating loss carryforwards	$ 26,280,000	$ 24,590,000
Federal [Member] | Minimum [Member]
Income Taxes Operating Loss Carryforwards[Abstract]
Operating loss carryforwards, expiration dates	Dec. 31, 2020	Dec. 31, 2020
Federal [Member] | Maximum [Member]
Income Taxes Operating Loss Carryforwards[Abstract]
Operating loss carryforwards, expiration dates	Dec. 31, 2037	Dec. 31, 2037
North Carolina [Member]
Income Taxes Operating Loss Carryforwards[Abstract]
Operating loss carryforwards	$ 20,240,000	$ 20,220,000
North Carolina [Member] | Minimum [Member]
Income Taxes Operating Loss Carryforwards[Abstract]
Operating loss carryforwards, expiration dates	Dec. 31, 2023	Dec. 31, 2023
North Carolina [Member] | Maximum [Member]
Income Taxes Operating Loss Carryforwards[Abstract]
Operating loss carryforwards, expiration dates	Dec. 31, 2033	Dec. 31, 2033
Other State [Member] | Minimum [Member]
Income Taxes Operating Loss Carryforwards[Abstract]
Operating loss carryforwards, expiration dates	Dec. 31, 2021	Dec. 31, 2021
Other State [Member] | Maximum [Member]
Income Taxes Operating Loss Carryforwards[Abstract]
Operating loss carryforwards, expiration dates	Dec. 31, 2034	Dec. 31, 2034
Hong Kong Tax Code [Member]
Income Taxes Operating Loss Carryforwards[Abstract]
Operating loss carryforwards	$ 6,030,000	$ 6,030,000
Valuation allowance	$ (996,000)	$ (996,000)	$ (996,000)