Note 11. Warrants (Detail) (USD $)	1 Months Ended	6 Months Ended
	Sep. 30, 2009	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Proceeds from Issuance of Warrants	$ 7,100,000
Proceeds from Issuance of Warrants, Net	6,300,000
Common Stock and Warrants Issued, Shares (in Shares)	2,018,153
Common Stock, Shares, Issued (in Shares)	1,009,076	33,899,057		33,899,057
Investment Warrants, Exercise Price (in Dollars per share)	$ 5.24	$ 3.15
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Outstanding, Weighted Average Remaining Contractual Terms	66 months
Common Stock Warrant Liability		536,121		166,398
Change in Fair Value of Common Stock Warrant Liability		369,723	417,860
Class of Warrant or Right, Outstanding (in Shares)		11,649,987
Common Stock Warrants Weighted Average Remaining Contractual Term		4 years 255 days
Warrant Liability [Member]
Change in Fair Value of Common Stock Warrant Liability		$ 447,323