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Note 9. Shareholders' Equity (Detail) - Stock Purchase Warrants (USD $)			12 Months Ended
	Dec. 31, 2011	Dec. 31, 2009	Dec. 31, 2011 $2.44 [Member] Series 1 [Member]	Dec. 31, 2011 $2.55 [Member] Series 1 [Member]	Dec. 31, 2011 $2.49 [Member] Series 3 [Member]
Warrants (in Dollars)	$ 22,332,623	$ 14,168,000	$ 5,200,519	$ 460,976	$ 16,671,128
Exercise Price			2.44	2.55	2.49
Expiration Date			Jun. 30, 2014	Jun. 30, 2014	Aug. 31, 2014

Value of warrants and rights outstanding. "Equity warrants and rights outstanding" represents derivative securities that give the holder the right to purchase securities (usually equity) from the issuer at a specific price within a certain time frame. Warrants are often included in a new debt issue to entice investors by a higher return potential.

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