Annual report pursuant to Section 13 and 15(d)

Long-Term Debt (Components of Long-Term Debt) (Parenthetical) (Detail)

v3.8.0.1
Long-Term Debt (Components of Long-Term Debt) (Parenthetical) (Detail) - USD ($)
12 Months Ended
Jun. 03, 2014
Dec. 31, 2017
Dec. 31, 2016
Debt Instrument [Line Items]      
Fair Value Of Debt Embedded Conversion Price Adjustment Option $ 1,938,988    
Convertible, Senior Secured Notes Issued Debt Issuance Costs [Member]      
Debt Instrument [Line Items]      
Debt Issuance Costs, Net     $ 139,340
Convertible Senior Secured Notes payable [Member]      
Debt Instrument [Line Items]      
Long term debt repayment starting date   Jun. 03, 2017 Jun. 03, 2017
Long term debt, fixed interest rate   5.00% 5.00%
Debt Instrument, Convertible, Conversion Price   $ 2.25 $ 2.25