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Shares Issued through Equity Offering Program (Details) - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended
	Oct. 31, 2017	Sep. 30, 2017	Sep. 30, 2017
Shares Issued through Equity Offering Program
Number of shares sold (in shares)	4,197	103,196	135,196
Proceeds from sale of shares, net of commission and before offering costs	$ 102,000	$ 2,461,000	$ 3,252,000
Payment of commissions on sale of shares	$ 1,000	25,000	33,000
Payment of offering costs on sale of shares.		$ 43,000	$ 185,000

X

- Definition

The cash outflow for commissions incurred directly with the issuance of an equity security.

+ References

No definition available.

+ Details

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X

- 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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- References

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X

- Definition

Represents the net proceeds after commissions but before offering costs from new stocks issued during the period.

+ References

No definition available.

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X

- 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

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