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Shares Issued through Equity Offering Program (Details) | 6 Months Ended
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Jun. 30, 2018 USD ($) shares
Shares Issued through Equity Offering Program |
Number of shares sold (in shares) | shares | 93,417
Proceeds from sale of shares, net of commission and before offering costs | $ 2,303,000
Payment of commissions on sale of shares | 23,000
Payment of offering costs on sale of shares. | $ 45,000

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