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Consolidated Statements of Comprehensive Loss - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Statement of Comprehensive Income [Abstract]      
Net loss $ (12,276,520) $ (1,218,237) $ (7,798,300)
Other comprehensive income      
Effective portion of changes in fair value of interest swap contracts 56,084 592,460 418,723
Total other comprehensive income 56,084 592,460 418,723
Total comprehensive loss $ (12,220,436) $ (625,777) $ (7,379,577)