STOCKHOLDERS' EQUITY - Additional Information (Details) - USD ($)			3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 03, 2019	Feb. 07, 2019	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Class of Stock [Line Items]
Common Stock, Shares, Issued			7,656,046		7,656,046		7,579,995
Common Stock, Shares, Outstanding			7,656,046		7,656,046		7,579,995
Number of options granted	92,939	28,700			13,341
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights					21,932
Stock or Unit Option Plan Expense			$ 760,202
Restricted Stock or Unit Expense			181,757	$ 83,363	$ 558,384	$ 304,227
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options			$ 809,691		$ 809,691
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			11,446		11,446
Weighted average exercise price	$ 6.53
Term of option	10 years
Vesting term	3 years
Black-Scholes value on the grant date of the options	$ 571,471				$ 258,392
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number			9,999		9,999
Stock Issued During Period Shares Stock Warrants Exercised					40,183
Proceeds from Warrant Exercises					$ 116,827
Preferred Stock, Liquidation Preference, Value			$ 1,268,774		$ 1,268,774		$ 1,242,740
Preferred Stock, Liquidation Preference Per Share			$ 10		$ 10
Proceeds from Stock Options Exercised					$ 24,897
Employee Stock Option
Class of Stock [Line Items]
Expected dividend yield (as a percent)					0.00%
Allocated Share-based Compensation Expense			$ 93,495	$ 78,152	$ 165,769	223,198
Warrant [Member]
Class of Stock [Line Items]
Allocated Share-based Compensation Expense					$ 109,207	$ 110,600
Class of Warrant or Right, Number of Securities Called by Warrants or Rights			0		0
Stock Issued During Period Shares Stock Warrants Exercised					3,937
Maximum [Member] | Employee Stock Option
Class of Stock [Line Items]
Expected term					6 years
Expected volatility (as a percent)					156.23%
Risk-free interest rate (as a percent)					2.48%
Minimum [Member] | Employee Stock Option
Class of Stock [Line Items]
Expected term					3 years 3 months
Expected volatility (as a percent)					152.58%
Risk-free interest rate (as a percent)					1.83%
Series A Preferred Stock [Member]
Class of Stock [Line Items]
Redemption Price (in dollars per share)			$ 4.385		$ 4.385		$ 4.385
Preferred Stock, Dividend Rate, Percentage					5.00%
Dividends, Preferred Stock, Stock					$ 26,034
Common Stock Dividends, Shares					5,937
Preferred stock unpaid dividend equivalent common stock, Shares					49,891		43,954
Dividends Payable			$ 218,774		$ 218,774		$ 192,740
Preferred Stock, Shares Issued			105,000		105,000		105,000
Preferred Stock Issue Per Share			$ 10		$ 10