v3.10.0.1

Consolidated Condensed Schedule Of Investments Consolidated Condensed Schedule of Investments (Cash Equivalents) - Cash Equivalents [Member] - USD ($)
shares in Thousands, $ in Thousands

6 Months Ended

12 Months Ended

Jun. 30, 2018

Dec. 31, 2017

Schedule of Investments [Line Items]

Money Market Funds, at Carrying Value

$ 6,833

^[1]

$ 26,500

^[2]

Money Market Funds, at Cost

$ 6,833

^[1]

$ 26,500

^[2]

Investment owned as a percentage of equity

1.11%

^[1],[3]

4.27%

^[2],[4]

Various Money Market Funds [Member]

Schedule of Investments [Line Items]

Money Market Funds, at Carrying Value

$ 6,833

^[1]

$ 26,500

^[2]

Investment Owned, Balance, Shares

6,833

^[1]

26,500

^[2]

Rate

^[2]

1.17%

Various Money Market Funds [Member] | Minimum [Member]

Schedule of Investments [Line Items]

Rate

^[1]

1.80%

Various Money Market Funds [Member] | Maximum [Member]

Schedule of Investments [Line Items]

Rate

^[1]

1.81%

[1]	See Note 2 and Note 3 in Notes to Consolidated Financial Statements.
[2]	See Note 2 and Note 3 in Notes to Consolidated Financial Statements.
[3]	Classification percentages are based on Total Equity.
[4]	Classification percentages are based on Total Equity.

X

- Definition

Represents cost basis of money market funds carried at fair value.

+ References

No definition available.

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X

- Definition

The interest rate for investments that have an interest rate. For fixed rate investments, this indicates the fixed interest rate. If the investment has a variable interest rate, the rate stated here may be the rate that is currently relevant. In this case the "Investment, Interest Rate is Current Rate for Variable Rate Investment Flag", "Investment, Interest Rate is Discount Rate at Purchase Flag", "Investment, Interest Rate Reflects Current Yield Flag" should be used. If one of these flags are not appropriate to explain the interest rate that is indicated, then a new flag should be added or an explanation should be included in "Investment, Additional Information".

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 12
-Sentence Column A

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Balance held at close of period in number of shares.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 4
-Subparagraph (SX 210.12-12C.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 6
-Subparagraph (SX 210.12-14.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611322-123010

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-12.Column B)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=63488139&loc=d3e12121-115841

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- Definition

Percent of net assets at close of period. For schedules of investments that are categorized, each category has a percent of net assets for the aggregated value of the Investments in the category.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=63488139&loc=d3e12121-115841

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
-Topic 946
-SubTopic 320
-Section S99
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-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611133-123010

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-Name Accounting Standards Codification
-Topic 946
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-Paragraph 4
-Subparagraph (SX 210.12-12C.Column D.2)
-URI http://asc.fasb.org/extlink&oid=50485924&loc=d3e611225-123010

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- Definition

Investment in short-term money-market instruments (such as commercial paper, banker's acceptances, repurchase agreements, government securities, certificates of deposit, and so forth) which are highly liquid (that is, readily convertible to known amounts of cash) and so near their maturity that they present an insignificant risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify as cash equivalents by definition. Original maturity means an original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three-years ago does not become a cash equivalent when its remaining maturity is three months.

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