Quarterly report pursuant to Section 13 or 15(d)

Benefit Plans - Stock Options Activity Under Share-Based Payment Plans (Details)

v3.7.0.1
Benefit Plans - Stock Options Activity Under Share-Based Payment Plans (Details) - Employees And Non Employee Stock Option
$ / shares in Units, shares in Thousands, $ in Thousands
 6 Months Ended
Jun. 30, 2017
USD ($)
$ / shares
shares
Options  
Outstanding as of beginning of period (in shares) | shares 332,648
Granted (in shares) | shares 3,047
Exercised (in shares) | shares (21,616)
Forfeited, cancelled or expired (in shares) | shares (2,657)
Outstanding as of end of period (in shares) | shares 311,422
Exercisable (in shares) | shares 21,616
Weighted- Average Exercise Price Per Share  
Outstanding as of beginning of period (in dollars per share) | $ / shares $ 3.50
Granted (in dollars per share) | $ / shares 4.91
Exercised (in dollars per share) | $ / shares 2.78
Forfeited, cancelled or expired (in dollars per share) | $ / shares 3.76
Outstanding as of end of period (in dollars per share) | $ / shares 3.56
Exercisable (in dollars per share) | $ / shares $ 2.91
Weighted- Average Remaining Contractual Term (Years)  
Outstanding 6 years 11 months 8 days
Exercisable 5 years 8 months 23 days
Aggregate Intrinsic Value  
Outstanding | $ $ 593,984
Exercisable | $ $ 291,021