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Shares Issued Through Equity Offering Program (Details) - USD ($) |  | 6 Months Ended
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Mar. 20, 2014 | Jun. 30, 2015
Shares Issued Through Equity Offering Program |  |
Maximum aggregate sales price of shares to be sold under an Equity Offering Sales Agreement (in dollars) | $ 38,360,000 |
Number of shares sold (in shares) |  | 51,000
Proceeds from sale of shares, net of commission and before offering costs |  | $ 1,142,000
Payment of commissions on sale of shares |  | 12,000
Payment of offering costs on sale of shares |  | $ 48,000

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- Definition The cash outflow for offering costs incurred directly with the issuance of an equity security. + References No definition available. + Details
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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 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: 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 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30 -Article 5 + Details
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