FAIR VALUE OF FINANCIAL INSTRUMENTS - Carrying Value and Estimated Fair Value (Details) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Carrying Value
Carrying value and estimated fair value of financial instruments
Cash and Cash Equivalents	$ 2,682,205	$ 2,310,489
Restricted Cash	1,336,361	19,721,475
Long-Term Debt	206,991,712	247,624,811
Estimated Fair Value | Quoted Prices in Active Markets for Identical Assets (Level 1)
Carrying value and estimated fair value of financial instruments
Cash and Cash Equivalents	2,682,205	2,310,489
Restricted Cash	1,336,361	19,721,475
Estimated Fair Value | Significant Other Observable Inputs (Level 2)
Carrying value and estimated fair value of financial instruments
Long-Term Debt	$ 208,584,073	$ 248,765,650