Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - Stock Options Outstanding (Details)

v3.10.0.1
Stock-based Compensation - Stock Options Outstanding (Details)
shares in Thousands
 12 Months Ended
Dec. 31, 2018
$ / shares
shares
Option Outstanding, Number of Shares (in shares) | shares 6,466
Options Outstanding, Weighted-Average Remaining Contractual Life (Years) 8 years 4 months 2 days
Options Outstanding, Weighted Average Price (in dollars per share) $ 3.05
Options Exercisable, Number of Shares (in shares) | shares 2,149
Options Exercisable, Weighted Average Price (in dollars per share) $ 5.22
$0.49 - $1.59  
Range of Exercise Prices, Lower (in dollars per share) 0.49
Range of Exercise Prices, Upper (in dollars per share) $ 1.59
Option Outstanding, Number of Shares (in shares) | shares 688
Options Outstanding, Weighted-Average Remaining Contractual Life (Years) 8 years 5 months 9 days
Options Outstanding, Weighted Average Price (in dollars per share) $ 1.17
Options Exercisable, Number of Shares (in shares) | shares 272
Options Exercisable, Weighted Average Price (in dollars per share) $ 1.13
$1.76 - $1.79  
Range of Exercise Prices, Lower (in dollars per share) 1.76
Range of Exercise Prices, Upper (in dollars per share) $ 1.79
Option Outstanding, Number of Shares (in shares) | shares 1,824
Options Outstanding, Weighted-Average Remaining Contractual Life (Years) 9 years 6 months
Options Outstanding, Weighted Average Price (in dollars per share) $ 1.76
Options Exercisable, Number of Shares (in shares) | shares 68
Options Exercisable, Weighted Average Price (in dollars per share) $ 1.79
$1.82 - $2.85  
Range of Exercise Prices, Lower (in dollars per share) 1.82
Range of Exercise Prices, Upper (in dollars per share) $ 2.85
Option Outstanding, Number of Shares (in shares) | shares 2,422
Options Outstanding, Weighted-Average Remaining Contractual Life (Years) 9 years 1 month 2 days
Options Outstanding, Weighted Average Price (in dollars per share) $ 2.16
Options Exercisable, Number of Shares (in shares) | shares 381
Options Exercisable, Weighted Average Price (in dollars per share) $ 2.54
$3.22 - $15.33  
Range of Exercise Prices, Lower (in dollars per share) 3.22
Range of Exercise Prices, Upper (in dollars per share) $ 15.33
Option Outstanding, Number of Shares (in shares) | shares 1,532
Options Outstanding, Weighted-Average Remaining Contractual Life (Years) 5 years 9 months 18 days
Options Outstanding, Weighted Average Price (in dollars per share) $ 6.85
Options Exercisable, Number of Shares (in shares) | shares 1,428
Options Exercisable, Weighted Average Price (in dollars per share) $ 6.89