XML 69 R58.htm IDEA: XBRL DOCUMENT v3.20.2
Shares Issued through the At-the-Market Equity Offering Program (Details) - At-the-Market Equity Offering Program - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Shares Issued through the At-the-Market Equity Offering Program        
Number of shares sold (in shares) 0 0 0 180,120
Proceeds from sale of common stock, net of commissions       $ 5,392,000
Payment of commissions on sale of shares       54,000
Payment of offering costs on sale of shares       $ 136,000