Annual report pursuant to Section 13 and 15(d)

Income Taxes (Pre-Tax Earnings) (Detail)

v3.8.0.1
Income Taxes (Pre-Tax Earnings) (Detail) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Pre-Tax (Loss) Earnings      
Total Pre-Tax (Loss) Earnings $ (19,633,502) $ (19,250,082) $ (13,427,478)
U.S.      
Pre-Tax (Loss) Earnings      
Total Pre-Tax (Loss) Earnings (19,680,720) (19,263,625) (13,425,887)
Outside the U.S. [Member]      
Pre-Tax (Loss) Earnings      
Total Pre-Tax (Loss) Earnings $ 47,218 $ 43,543 $ (1,591)