Stock-based Compensation - 2009 Stock Option Plan (Details) - 2009 Stock Option Plan [Member] |
9 Months Ended |
---|---|
Sep. 30, 2016 | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
Expiration period of options | 10 years |
Minimum [Member] | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
Percentage of exercise price | 100.00% |
Vesting period of options | 3 years |
Maximum [Member] | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
Percentage of exercise price | 110.00% |
Vesting period of options | 4 years |