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Quarterly Financial Information (Schedule of Quarterly Financial Information (Unaudited)) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 13,497,906	$ 8,492,530	$ 10,163,724	$ 8,587,605	$ 11,649,288	$ 11,196,961	$ 8,667,127	$ 9,636,755	$ 40,741,765	$ 41,150,131	$ 33,025,560
Operating income (loss)	(2,262,689)	(1,806,883)	(868,978)	(2,452,222)	(903,326)	(839,349)	(1,680,871)	(657,802)	(7,390,772)	(4,081,348)	(1,433,131)
Net income (loss) attributable to common shareholders	$ (2,220,097)	$ (1,643,044)	$ (720,688)	$ (2,379,239)	$ (800,545)	$ (743,031)	$ (5,160,611)	$ (1,274,446)	$ (6,963,068)	$ (7,978,633)	$ (944,683)
Earnings per share attributable to common shareholders
Basic (in USD per share)	$ (0.14)	$ (0.11)	$ (0.05)	$ (0.15)	$ (0.05)	$ (0.05)	$ (0.32)	$ (0.08)	$ (0.45)	$ (0.50)	$ (0.06)
Diluted (in USD per share)	$ (0.14)	$ (0.11)	$ (0.05)	$ (0.15)	$ (0.05)	$ (0.05)	$ (0.32)	$ (0.08)	$ (0.45)	$ (0.50)	$ (0.06)

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