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Convertible Notes Payable - Additional Information (Detail) - USD ($)
1 Months Ended 9 Months Ended
Feb. 01, 2016
Oct. 15, 2015
Oct. 14, 2015
Jul. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Mar. 31, 2015
Mar. 28, 2014
Debt conversion description [Line Items]                
Debt conversion, price per share of common stock         $ 8      
Class of Warrant or Right, Exercise Price of Warrants or Rights     $ 9.00          
Debt Instrument, Unamortized Discount         $ 0   $ 1,060,401  
Debt Instrument, Convertible, Beneficial Conversion Feature         0 $ 578,155    
Stock Issued During Period, Shares, Conversion of Convertible Securities     275,000          
Stock Issued During Period, Value, Conversion of Convertible Securities         $ 1,402,500 $ 0    
Convertible Notes Payable [Member]                
Debt conversion description [Line Items]                
Debt conversion, price per share of common stock               $ 10.00
Debt Instrument, Face Amount               $ 2,000,000
Convertible notes, interest rate     8.00%         8.00%
Debt Instrument, Interest Rate, Stated Percentage     8.00%         8.00%
Convertible Notes Payable [Member] | Subsequent Event [Member]                
Debt conversion description [Line Items]                
Convertible notes, interest rate 9.00%              
Stock Issued During Period, Shares, Conversion of Convertible Securities 105,000              
Debt Instrument, Interest Rate, Stated Percentage 9.00%              
Stock Issued During Period, Value, Conversion of Convertible Securities $ 420,000              
8% Senior Subordinated Convertible Notes due February 1, 2015                
Debt conversion description [Line Items]                
Debt Instrument, Unamortized Discount             985,255  
9% Senior Subordinated Convertible Notes due February 15, 2016                
Debt conversion description [Line Items]                
Convertible notes payable, interest payment terms         If the Average Daily Value of Trades (ADVT) during the prior 90 days as reported by Bloomberg is greater than $100,000, the 9% Notes are callable at a price of 105% of the 9% Notes par value, and if the ADVT is less than $100,000, the 9% Notes are callable at a price of 110% of the 9% Notes par value.      
Debt conversion, price per share of common stock         $ 4.00      
Class of Warrant or Right, Number of Securities Called by Warrants or Rights         66,000      
Class of Warrant or Right, Exercise Price of Warrants or Rights         $ 4.50      
Debt Instrument, Unamortized Discount         $ 6,052   $ 62,182  
Convertible notes, interest rate         9.00%      
Fair Value Assumptions, Expected Term         5 years      
Fair Value Assumptions, Risk Free Interest Rate         0.70%      
Fair Value Assumptions, Expected Volatility Rate         36.70%      
Redemption Notice Period         60 days      
Notes Payable, Fair Value Disclosure         $ 186,897      
Debt Instrument, Interest Rate, Stated Percentage         9.00%      
NNA Financing 8 Convertible Note                
Debt conversion description [Line Items]                
Debt Instrument, Face Amount         $ 2,000,000      
Debt Instrument, Unused Borrowing Capacity, Amount       $ 2,000,000        
Proceeds from Issuance of Debt       2,000,000        
Debt Instrument, Unamortized Discount       1,065,775        
Convertible notes, interest rate         8.00%      
Debt Instrument, Convertible, Beneficial Conversion Feature       $ 578,155        
Debt Instrument, Interest Rate, Stated Percentage         8.00%      
NNA 8 Convertible Notes                
Debt conversion description [Line Items]                
Long-term Line of Credit   $ 7,304,506            
Line of Credit Facility, Annual Principal Payment   7,282,500            
Line of Credit Facility, Periodic Payment, Interest   $ 22,006