Annual report pursuant to Section 13 and 15(d)

Subsequent Events Subsequent Events (Details)

v3.19.1
Subsequent Events Subsequent Events (Details)
3 Months Ended
Nov. 01, 2017
Mar. 31, 2019
Feb. 08, 2019
shares
Dec. 31, 2018
shares
Subsequent Event [Line Items]        
Number of shares authorized to be sold under equity distribution agreement (in shares)       10,000,000
Number of common shares issued under equity distribution agreement and outstanding as of period-end (in shares)       3,792,935
Reverse stock split, conversion ratio 0.50      
Subsequent Event [Member]        
Subsequent Event [Line Items]        
Number of shares authorized to be sold under equity distribution agreement (in shares)     35,000,000  
Percentage of gross proceeds compensated to sales agent   2.00%