Quarterly report pursuant to Section 13 or 15(d)

Stock-based Compensation (Options) (Details)

v3.4.0.3
Stock-based Compensation (Options) (Details)
$ / shares in Units, $ in Thousands
 3 Months Ended
Mar. 31, 2016
USD ($)
item
$ / shares
shares
Mar. 31, 2015
USD ($)
$ / shares
shares
Stock Based Compensation    
Share-based compensation $ 1,438 $ 2,054
Employee Stock Option    
Stock Based Compensation    
Number of homogenous groups for purposes of determining fair values of options | item 3  
Contractual term of the option 10 years  
Weighted-average assumptions relating to options granted    
Risk-free interest rate (as a percent) 1.80% 1.80%
Expected term (in years) 6 years 7 months 6 days 6 years 6 months
Dividend yield (as a percent) 0.00% 0.00%
Expected volatility (as a percent) 60.50% 64.90%
Additional disclosures    
Options granted (in shares) | shares 3,184,250 3,505,125
Grant-date weighted-average fair value (in dollars per share) | $ / shares $ 1.60 $ 1.31
Total unrecognized compensation cost, net of estimated forfeitures $ 7,900  
Shares of common stock available for future grant | shares 2,494,985  
Options exercised during the period (in shares) | shares 1,666  
Employee Stock Option | Consultant    
Stock Based Compensation    
Contractual term of the option 10 years  
Employee Stock Option | Recipient Of Performance Shares    
Stock Based Compensation    
Share-based compensation $ 0  
Additional disclosures    
Options granted (in shares) | shares 1,015,000 1,175,000
Grant date fair value of performance stock options awards $ 1,700  
Total unrecognized compensation cost, net of estimated forfeitures $ 2,500