Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - 2000 Equity Plan (Details)

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Stockholders' Equity - 2000 Equity Plan (Details) - shares
1 Months Ended 12 Months Ended
Aug. 31, 2014
Mar. 31, 2016
Stock options    
Stockholders' equity    
Portion vesting one year after the issuance date (as a percent)   25.00%
Portion vesting on first day of each month after one year from the issuance date (as a percent)   2.083%
Vesting period of awards after issuance date   1 year
Vesting period   4 years
Expiration Term   10 years
2000 Plan    
Stockholders' equity    
Number of shares of common stock reserved for issuance   1,849,000
Increase in common stock available under the plan 450,000  
Number of shares available for future grant   257,473