Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - 2015 Inducement Plan (Details)

v3.19.1
Stock-based Compensation - 2015 Inducement Plan (Details) - shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Mar. 26, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Granted (shares) 1,259,530 1,256,770  
2015 Inducement Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized under the plan (in shares)     450,000
Granted (shares) 0    
Possible future issuance under equity compensation plan (in shares) 5,000