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Quarterly Financial Information (Schedule of Quarterly Financial Information (Unaudited)) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Net revenues	$ 9,081,440	$ 8,791,753	$ 7,414,835	$ 7,737,532	$ 8,037,488	$ 7,885,048	$ 8,909,741	$ 8,686,774	$ 33,025,560	$ 33,519,051	$ 36,901,871
Operating income (loss)	(957,371)	130,132	(105,309)	(500,583)	162,679	270,884	673,931	4,116	(1,433,131)	1,111,610	3,558,836
Net income (loss) attributable to common shareholders	$ (749,694)	$ 106,166	$ (48,044)	$ (253,111)	$ 151,059	$ 126,613	$ 407,398	$ 46,281	$ (944,683)	$ 731,351	$ 2,423,723
Earnings per share attributable to common shareholders
Basic (in USD per share)	$ (0.05)	$ 0.01	$ 0.00	$ (0.02)	$ 0.01	$ 0.01	$ 0.02	$ 0.00	$ (0.06)	$ 0.04	$ 0.14
Diluted (in USD per share)	$ (0.05)	$ 0.01	$ 0.00	$ (0.02)	$ 0.01	$ 0.01	$ 0.02	$ 0.00	$ (0.06)	$ 0.04	$ 0.14

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.