Quarterly report pursuant to Section 13 or 15(d)

Capital Stock - ATM Agreements - Additional Information (Details)

v3.19.3
Capital Stock - ATM Agreements - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Dec. 18, 2018
Dec. 31, 2018
Feb. 28, 2017
Sep. 30, 2019
Mar. 31, 2018
Sep. 30, 2019
Common Stock [Member]            
Class Of Warrant Or Right [Line Items]            
Sale of shares   285,689 1,200,000   68,000  
2018 ATM Agreement [Member]            
Class Of Warrant Or Right [Line Items]            
Sales commission paid per transaction (in hundredths) 3.00%          
Maximum amount of shares can be issued $ 30,000,000          
2018 ATM Agreement [Member] | Common Stock [Member]            
Class Of Warrant Or Right [Line Items]            
Sale of shares       0   0