Annual report pursuant to Section 13 and 15(d)

Interest Rate Hedge Swaps (Details)

v3.8.0.1
Interest Rate Hedge Swaps (Details) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of (Loss) Gain on Derivatives Recognized in AOCI (Effective Portion) $ 0 $ (300,181) $ (611,879)
Amount of Loss on Derivatives Reclassified from AOCI (Effective Portion) Recognized in Net Income 0 (50,964) (287,999)
Not Designated as Hedging Instrument [Member]      
Derivative Instruments, Gain (Loss) [Line Items]      
Amount of (Loss) Gain on Derivatives Recognized in AOCI (Effective Portion) $ 25,842 $ 73,204 $ 0