Investment in Eldorado Rollforward (Details) (USD $)	2 Months Ended	12 Months Ended
Feb. 29, 2012	Feb. 28, 2011	Feb. 28, 2013	Feb. 29, 2012	Dec. 31, 2011
Equity Method Investment Rollforward [Roll Forward]
Equity in net income (loss) of Eldorado	$ 0		$ (647,096)	$ (6,853,314)	$ (6,853,314)
Eldorado's adoption of ASU 2010-16					133,561
Eldorado
Equity Method Investment Rollforward [Roll Forward]
Balance, beginning of period	23,861,936	28,197,330	23,861,936		28,197,330
Equity in net income (loss) of Eldorado	0	0	1,374,904	(4,233,314)	(4,233,314)
Distributions received from Eldorado	0	0	(596,257)	(235,641)	(235,641)
Balance, end of period	23,861,936		24,640,583	23,861,936	23,861,936
ASU 2010-16 \| Eldorado
Equity Method Investment Rollforward [Roll Forward]
Eldorado's adoption of ASU 2010-16	$ 0		$ 0		$ 133,561

This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

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

-Publisher FASB

-Name Accounting Standards Codification

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Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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-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.

Reference 8: http://www.xbrl.org/2003/role/presentationRef

-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

-Number 18

-Paragraph 19

-Subparagraph c

-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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