v3.19.1

Financial Highlights (Net Investment Income Ratio to Average Equity) (Details)	3 Months Ended
	Mar. 31, 2018
Investment Company, Financial Highlights [Abstract]
Net Investment Income (Loss) Ratio	6.75%

X

- References

No definition available.

+ Details

Name:	us-gaap_InvestmentCompanyFinancialHighlightsAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Percentage of investment income (loss) to average net assets.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 205
-Section 50
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=25866437&loc=d3e10328-115837

+ Details

Name:	us-gaap_InvestmentCompanyInvestmentIncomeLossRatio
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration