Quarterly report pursuant to sections 13 or 15(d)

Condensed Statement of Shareholders' Equity [Parenthetical]

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Condensed Statement of Shareholders' Equity [Parenthetical] (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2012
Dec. 31, 2011
Offering costs and underwriter discounts on initial public offering (in dollars)   $ 4,073,359
Maximum conversion of shares   3,904,037
Shares subject to possible conversion 57,236 10,680
Number of the share forfeited due to expiration of underwriters' over-allotment option   187,500