Quarterly report pursuant to sections 13 or 15(d)

Stock-Based Compensation - Additional Information (Detail)

v2.4.0.8
Stock-Based Compensation - Additional Information (Detail) (USD $)
3 Months Ended 3 Months Ended 3 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 18, 2013
Dec. 31, 2013
Research and Development Expense
Dec. 31, 2013
General and Administrative Expense
Dec. 31, 2013
Maximum
Dec. 31, 2013
Minimum
Dec. 31, 2013
Consultants
Dec. 31, 2013
2013 Stock Incentive Plan
Oct. 02, 2013
2013 Stock Incentive Plan
Jun. 18, 2013
2013 Stock Incentive Plan
Dec. 31, 2013
2013 Stock Incentive Plan
Consultants
Dec. 31, 2013
2013 Stock Incentive Plan
Consultants
Maximum
Dec. 31, 2013
2013 Stock Incentive Plan
Consultants
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                            
common stock, shares, issued 60,145,237 60,145,237                 7,825,388      
Increase in aggregate number of shares     3,000,000             2,405,809        
Percentage Of Outstanding Number Of Shares     4.00%                      
Share-based compensation arrangement by share-based payment award, options, grants in period, gross 220,000             220,000            
Share-based compensation arrangement by share-based payment award, options, outstanding, weighted average remaining contractual term 5 years                     10 years    
Share-based compensation arrangement by share-based payment award, award vesting period                       3 years    
Share-based compensation arrangements by share-based payment award, options, grants in period, weighted average exercise price $ 0.20                       $ 0.20 $ 0.19
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected volatility rate, minimum 113.00%                          
Share-based compensation arrangement by share-based payment award, fair value assumptions, risk free interest rate, minimum 2.80%                          
Share-based compensation arrangement by share-based payment award, fair value assumptions, risk free interest rate, maximum 3.04%                          
Share based compensation arrangement by share based payment award fair value assumptions expected forfeiture rate 0.00%                          
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected dividend rate 0.00%                          
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected term           10 years 9 years 8 months 12 days              
Share-based compensation arrangement by share-based payment award, number of shares available for grant 7,011,197                          
Allocated share-based compensation expense $ 131,563     $ 85,999 $ 45,564                  
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, total                 $ 915,000          
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition 2 years 7 months 2 days                          
Common Stock, Shares Authorized 300,000,000 300,000,000               10,231,197