DEBT - Interest Expenses (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Debt Instrument [Line Items]
Interest expense	$ 1,738,791	$ 1,070,860	$ 5,975,866	$ 3,364,736
Loss (gain) on interest rate swaps	221,530	(185,452)	1,095,547	(406,023)
Liabilities accrued interest payable (receivable)	11,780		11,780		$ 5,950
Mortgage Notes Payable
Debt Instrument [Line Items]
Interest expense	1,387,785	1,053,148	4,232,943	2,875,623
Amortization of deferred financing costs	120,932	127,182	500,525	632,717
Loss (gain) on interest rate swaps	218,642	(187,787)	1,109,027	(401,175)
Unsecured Credit Facility
Debt Instrument [Line Items]
Interest expense	0	69,745	110,060	236,142
Amortization of deferred financing costs	$ 11,432	$ 8,572	$ 23,311	$ 21,429