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Earnings (Loss) Per Share (Schedule of Computation of Numerator and Denominator in Earnings Per Share) (Details) - USD ($)	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Numerator:
Net income (loss) attributable to common shareholders	$ (800,545)	$ (743,031)	$ (5,160,611)	$ (1,274,446)	$ (749,694)	$ 106,166	$ (48,044)	$ (253,111)	$ (7,978,633)	$ (944,683)	$ 731,351
Denominator:
Weighted-average shares outstanding – basic (in shares)									15,911,577	16,236,525	16,715,970
Dilutive effect of restricted stock and stock options (in shares)									0	0	378,784
Weighted-average shares outstanding – diluted (in shares)									15,911,577	16,236,525	17,094,754

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Denominator.

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- Definition

Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period.

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