CONSOLIDATED STATEMENTS OF CASH FLOWS (Parentheticals) - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Statement of Cash Flows [Abstract]
Interest paid, net of amounts capitalized of $0, $0 and $80,166 for the years ended December 31, 2018, 2017 and 2016, respectively	$ 0	$ 0	$ 80,166