Annual report pursuant to Section 13 and 15(d)

Stockholders' Equity - Stock Options Outstanding (Details)

v3.20.1
Stockholders' Equity - Stock Options Outstanding (Details)
 12 Months Ended
Dec. 31, 2019
$ / shares
shares
Class of Stock [Line Items]  
Quantity, options outstanding (in shares) 3,463,692
Weighted-Average Remaining Contractual Life 3 years 5 months 8 days
Quantity, options exercisable (in shares) 1,096,071
Weighted-Average Remaining Contractual Life 2 years 3 months 10 days
Exercise Price 1  
Class of Stock [Line Items]  
Lower limit range (in dollars per share) | $ / shares $ 1.60
Upper limit range (in dollars per share) | $ / shares $ 2.93
Quantity, options outstanding (in shares) 732,627
Weighted-Average Remaining Contractual Life 3 years
Quantity, options exercisable (in shares) 440,330
Weighted-Average Remaining Contractual Life 2 years 29 days
Exercise Price 2  
Class of Stock [Line Items]  
Lower limit range (in dollars per share) | $ / shares $ 2.94
Upper limit range (in dollars per share) | $ / shares $ 3.00
Quantity, options outstanding (in shares) 849,998
Weighted-Average Remaining Contractual Life 3 years 8 months 1 day
Quantity, options exercisable (in shares) 146,832
Weighted-Average Remaining Contractual Life 3 years 3 months 29 days
Exercise Price 3  
Class of Stock [Line Items]  
Lower limit range (in dollars per share) | $ / shares $ 3.01
Upper limit range (in dollars per share) | $ / shares $ 3.95
Quantity, options outstanding (in shares) 685,152
Weighted-Average Remaining Contractual Life 3 years 6 months
Quantity, options exercisable (in shares) 138,819
Weighted-Average Remaining Contractual Life 1 year
Exercise Price 4  
Class of Stock [Line Items]  
Lower limit range (in dollars per share) | $ / shares $ 3.96
Upper limit range (in dollars per share) | $ / shares $ 6.92
Quantity, options outstanding (in shares) 578,720
Weighted-Average Remaining Contractual Life 4 years
Quantity, options exercisable (in shares) 95,553
Weighted-Average Remaining Contractual Life 3 years 3 months 18 days
Exercise Price 5  
Class of Stock [Line Items]  
Lower limit range (in dollars per share) | $ / shares $ 6.93
Upper limit range (in dollars per share) | $ / shares $ 19.20
Quantity, options outstanding (in shares) 617,195
Weighted-Average Remaining Contractual Life 3 years
Quantity, options exercisable (in shares) 274,537
Weighted-Average Remaining Contractual Life 2 years 3 months 18 days