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Stock-based Compensation and Stockholders' Equity - Equity Incentive Plan (Details) - Jun. 30, 2015 - shares
Total
Equity Incentive Plan, 2006 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Increase in number of shares of common stock reserved for issuance under the 2006 Plan 3.00%
Authorized shares available for future issuance under the 2006 Plan 482,258
Equity Incentive Plan, 2006, More Than 10% Ownership [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Percentage of fair market value 110.00%
Equity Incentive Plan, 2006, Less Than 10% Ownership [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Percentage of fair market value 100.00%
Employee Stock Options and Restricted Stock Units [Member] | Equity Incentive Plan, 2006 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting period 4 years
Employee Stock Options and Restricted Stock Units [Member] | Year One | Equity Incentive Plan, 2006 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock option and restricted stock units vesting rights, percentage 25.00%
Employee Stock Options and Restricted Stock Units [Member] | Quarterly | Equity Incentive Plan, 2006 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock option and restricted stock units vesting rights, percentage 6.25%
Stock Options [Member] | Equity Incentive Plan, 2006 [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Stock option expected life 10 years