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Shares Issued through Equity Offering Program (Details) - USD ($) |  | 1 Months Ended | 2 Months Ended | 3 Months Ended
--- | --- | --- | --- | ---
May 10, 2017 | Jul. 31, 2017 | Jun. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017
2014 Agreement |  |  |  |  |
Shares issued through equity offering program |  |  |  |  |
Number of shares sold (in shares) |  |  |  | 0 | 27,800
Proceeds from sale of shares, net of commission and before offering costs |  |  |  |  | $ 692,000
Payment of commissions on sale of shares |  |  |  |  | 7,000
Payment of offering costs on sale of shares. |  |  |  |  | $ 16,000
2017 Agreement |  |  |  |  |
Shares issued through equity offering program |  |  |  |  |
Maximum aggregate sales price of shares to be sold under an Equity Offering Sales Agreement | $ 50,000,000 |  |  |  |
Number of shares sold (in shares) |  | 5,806 | 4,200 |  |
Proceeds from sale of shares, net of commission and before offering costs |  | $ 137,000 | $ 99,000 |  |
Payment of commissions on sale of shares |  | $ 1,400 | 1,000 |  |
Payment of offering costs on sale of shares. |  |  | $ 126,000 |  |

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- Definition Number of new stock issued during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(28)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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