Consolidated Statement of Shareholders' Equity (Parenthetical) (Common Stock [Member], USD $)	12 Months Ended
Dec. 31, 2012	Dec. 31, 2011
Common Stock [Member]
Issuance of common stock	$ 1,129,916	$ 1,619,638

Includes offering costs of open-end investment companies, and closed-end funds with a continuous offering period.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 225

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-04.14)

-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration