Annual report pursuant to Section 13 and 15(d)

Long-Term Debt (Additional Information) (Detail)

v3.8.0.1
Long-Term Debt (Additional Information) (Detail) - USD ($)
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Line of Credit Facility [Line Items]      
Debt Conversion, Converted Instrument, Amount $ 1,861,283 $ 342,036 $ 472,500
Senior Secured Convertible Note [Member]      
Line of Credit Facility [Line Items]      
Debt Conversion, Converted Instrument, Amount $ 269,543    
Conversion of Stock, Shares Issued 119,797    
Conversion of Stock, Shares Converted 707,440    
Conversion of Stock, Amount Issued $ 1,591,740