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INTERIM STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY [Parenthetical]
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3 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
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Mar. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Mar. 31, 2013
Common Stock [Member]
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Dec. 31, 2011
Common Stock [Member]
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| Common stock subject to possible redemption, shares | 6,776,303 | 6,842,058 | 7,322,869 | ||
| Sale of 8,000,000 units on April 18, 2011, net of underwriters' discount and offering costs (in shares) | 8,000,000 | ||||
| Stock Issued During Period, Shares, New Issues | 120,000 |