Quarterly report pursuant to Section 13 or 15(d)

Subsequent events - Additional Information (Detail)

v2.4.0.8
Subsequent events - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
 6 Months Ended 0 Months Ended
Jun. 30, 2014
Jun. 30, 2014
2014 Equity Incentive Plan
Aug. 06, 2014
Subsequent Event
Aug. 06, 2014
Subsequent Event
2014 Equity Incentive Plan
Subsequent Event [Line Items]        
Stock Options, Granted 632,694     2,222
Common stock shares remainder vesting installment numbers     12 24
Annual retainer arrears payable on a pro-rata basis     $ 35  
Number of previously granted awards under 2012 and 2002 plan   2,328,569 6,666