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Shares Issued through the At-the-Market Equity Offering Program (Details) | 9 Months Ended
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Sep. 30, 2019 USD ($) shares
Shares Issued through the At-the-Market Equity Offering Program |
Number of shares sold (in shares) | shares | 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

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