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Equity - Additional Information (Detail) (USD $)
 6 Months Ended 0 Months Ended 12 Months Ended 0 Months Ended 1 Months Ended 0 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Mar. 11, 2014
Stock Incentive Plan 2011
Jan. 08, 2014
Stock Incentive Plan 2011
Dec. 31, 2013
Stock Incentive Plan 2011
Group 2
Mar. 11, 2014
Stock Incentive Plan 2011
Restricted Stock Units (RSUs)
Jan. 08, 2014
Stock Incentive Plan 2011
Restricted Stock Units (RSUs)
Jan. 31, 2013
Stock Incentive Plan 2011
Restricted Stock Units (RSUs)
Jan. 08, 2014
Stock Incentive Plan 2011
Stock Options
Stockholders Equity Note [Line Items]                  
Shares issued, exercise of stock options 215,000 319,750              
Gross proceeds from exercise of stock options $ 300,000 $ 500,000              
Net proceeds from exercise of stock options 284,000 541,000              
Shares issued, exercise of warrants   70,000              
Gross proceeds from exercise of warrants   100,000              
Net proceeds from exercise of warrants   $ 70,000              
Stock units, Granted           173,348 2,082,000 454,875  
Stock options, Granted     205,890 2,605,500          
Stock options, Vesting Period             3 years   4 years
Restricted stock units, issued as a result of vesting         0