Quarterly report pursuant to Section 13 or 15(d)

Stock incentive plans - Additional Information (Details)

v2.4.0.8
Stock incentive plans - Additional Information (Details) (USD $)
In Thousands, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended 0 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Apr. 02, 2014
Subsequent Event
Mar. 31, 2014
2014 Equity Incentive Plan
Mar. 31, 2014
2012 Plan
Mar. 31, 2014
2012 Plan
Maximum
Mar. 12, 2012
2002 Plan
Contract Termination
Mar. 12, 2012
2002 Plan
Maximum
Contract Termination
Mar. 31, 2014
Employee Stock Purchase Plan
Mar. 31, 2014
Employee Stock Purchase Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                      
Common stock reserved for future issuance         895,346            
Number of previously granted awards under 2012 and 2002 plan         2,328,569            
Percentage on outstanding shares of common stock         4.00%           1.50%
Stock options and other equity awards           1,216,772          
Stock option exercise price fair value percentage             100.00%        
Stock option shares outstanding               1,424,540 1,424,646    
Stock option period, expiration 10 years                    
Stock option period, vested 4 years                    
Number of shares approved for issuance       632,694             179,069
Number of shares exercise price       16.62              
Rate of reduced stock-based compensation expense for estimated forfeiture 5.70% 5.70%                  
Stock-based compensation expense $ 122 $ 24                  
Exercise price as a percentage of stock price on the enrollment date                   85.00%  
Exercise price as a percentage of stock price on the purchase date                   85.00%  
Stock-based compensation $ 131 $ 24 $ 206               $ 9
Potential increase of shares available for issuance                   179,069 179,069