Note 8. Shareholders' Equity (Detail) - Stock Purchase Warrants (USD $)	3 Months Ended
	Mar. 31, 2012
Total warrants outstanding (in Dollars)	$ 22,332,623
Series 1 Warrants 2_43 [Member]
Warrants (in Shares)	5,200,519
Exercise Price (in Dollars per Item)	2.43
Expiration Date	Jun. 30, 2014
Series 1 Warrants 2_54 [Member]
Warrants (in Shares)	460,976
Exercise Price (in Dollars per Item)	2.54
Expiration Date	Jun. 30, 2014
Series 3 Warrants [Member]
Warrants (in Shares)	16,671,128
Exercise Price (in Dollars per Item)	2.48
Expiration Date	Aug. 31, 2014