XML 40 R27.htm IDEA: XBRL DOCUMENT v3.7.0.1
Stockholders' Equity - Stock Options assumptions (Details) - shares
3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Stock-Based Compensation Plans      
Shares authorized and reserved 11,850,563   11,003,563
Fair Value Assumptions      
Expected volatility 93.02% 99.37%  
Risk-free interest rate 2.12% 1.46%  
Weighted-average expected life (in years) 6 years 3 months 18 days 6 years 3 months 18 days  
Dividend yield 0.00% 0.00%  
1997 And 2007 Plans | Service based vesting      
Additional disclosures      
Vesting period 4 years    
1997 And 2007 Plans | Service based vesting, first period      
Additional disclosures      
Vesting period 2 years    
Shares that will vest (as a percentage) 50.00%    
1997 And 2007 Plans | Performance based vesting      
Additional disclosures      
Vesting period 4 years    
2010 Equity Incentive Plan | Minimum      
Additional disclosures      
Vesting period 3 years    
2010 Equity Incentive Plan | Maximum      
Additional disclosures      
Vesting period 4 years