Quarterly report pursuant to Section 13 or 15(d)

Common Stock - Summary of Fair Value of Option Awards (Detail)

v2.4.1.9
Common Stock - Summary of Fair Value of Option Awards (Detail)
3 Months Ended
Mar. 31, 2014
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]  
Risk-free interest rates 1.82%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate
Expected dividend yield 0.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate
Expected life 5 years 10 months 24 days
Expected volatility 81.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate