INTERIM STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (Parenthetical)	3 Months Ended	12 Months Ended
Mar. 31, 2012	Dec. 31, 2011
Net proceeds subject to possible redemption, shares	6,999,783	6,962,869
First Issuance
Sale of common stock, issuance date		Jan. 28, 2011
Second Issuance
Sale of common stock, issuance date		Apr. 18, 2011

Number of stock bought back by the entity at the exercise price or redemption price.

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 Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4, 5

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration