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Redeemable Convertible Preferred Stock - Additional Information (Detail)
 12 Months Ended
May 02, 2012
USD ($)
Dec. 31, 2016
USD ($)
Installment
$ / shares
shares
Dec. 31, 2015
USD ($)
$ / shares
shares
Apr. 30, 2012
shares
Apr. 13, 2012
$ / shares
shares
Temporary Equity [Line Items]          
Redeemable convertible preferred stock, shares issued   1,000,000 1,000,000    
Common stock, shares issued   8,499,508 8,385,929   1,000,000
Number of warrants   325,000      
Redeemable convertible preferred stock, shares authorized   1,000,000 1,000,000    
Preferred stock and warrants value issued | $ $ 5,000,000        
Warrants value | $   $ 840,000      
Accretion amount | $   $ 50,000 $ 50,000    
Warrants Exercise Price Tranche One          
Temporary Equity [Line Items]          
Warrant exercise price per share | $ / shares         $ 6.00
Number of warrants         125,000
Warrants Exercise Price Tranche Two          
Temporary Equity [Line Items]          
Warrant exercise price per share | $ / shares         $ 7.00
Number of warrants         200,000
Securities Purchase Agreement          
Temporary Equity [Line Items]          
Number of warrants         325,000
Series A Convertible Preferred Stock          
Temporary Equity [Line Items]          
Redeemable convertible preferred stock, stock price per share | $ / shares         $ 5.00
Redeemable convertible preferred stock, shares authorized       1,000,000  
Cumulative dividends at a rate   6.00%      
Preferred stock value | $ $ 4,160,000        
Series A Convertible Preferred Stock | Accounts Payable and Other Accrued Expenses          
Temporary Equity [Line Items]          
Total accrued but unpaid dividends | $   $ 230,000 $ 230,000    
Series A Convertible Preferred Stock | Scenario, Plan          
Temporary Equity [Line Items]          
Redeemable convertible preferred stock, liquidation preference per share | $ / shares   $ 5.00      
Number of redemption price, accrued and unpaid dividends installment payments | Installment   36      
Annual interest rate on redemption value payable   6.00%      
Redemption price per share | $ / shares   $ 5.00 $ 5.00    
Series A Convertible Preferred Stock | Scenario, Plan | Maximum          
Temporary Equity [Line Items]          
Majority outstanding shares redeemable date   Apr. 30, 2017      
Series A Convertible Preferred Stock | Securities Purchase Agreement          
Temporary Equity [Line Items]          
Redeemable convertible preferred stock, shares issued         1,000,000
Warrant exercise price per share | $ / shares         $ 5.00