Note 7. Preferred Stock (Detail) (USD $)	1 Months Ended			3 Months Ended	9 Months Ended			1 Months Ended	9 Months Ended					1 Months Ended		3 Months Ended	9 Months Ended			1 Months Ended
	Sep. 30, 2012	Mar. 31, 2011	Feb. 28, 2011	Sep. 30, 2012	Sep. 30, 2012	Apr. 02, 2012	Dec. 31, 2011	Apr. 30, 2012 Warrant [Member] Series B Preferred Stock [Member]	Sep. 30, 2012 Series A Preferred Stock [Member] Black-Scholes option pricing model [Member]	Sep. 30, 2012 Series A Preferred Stock [Member]	Jun. 30, 2012 Series A Preferred Stock [Member]	Feb. 29, 2012 Series A Preferred Stock [Member]	Dec. 31, 2011 Series A Preferred Stock [Member]	Sep. 30, 2012 Series B Preferred Stock [Member]	Apr. 30, 2012 Series B Preferred Stock [Member]	Sep. 30, 2012 Series B Preferred Stock [Member]	Sep. 30, 2012 Series B Preferred Stock [Member]	Dec. 31, 2011 Series B Preferred Stock [Member]	Sep. 30, 2012 Maximum [Member]	Sep. 30, 2012 Minimum [Member]
Preferred Stock, Shares Authorized	5,000,000			5,000,000	5,000,000		5,000,000			2,000			2,000	1,065		1,065	1,065	1,065
Preferred Stock, Dividend Rate, Percentage										0.00%							0.00%
Preferred Stock, Shares Issued												2,000			1,065
Sale of Stock, Price Per Share (in Dollars per share)	$ 0.08			$ 0.08	$ 0.08							$ 1,000			$ 1,000				$ 0.17	$ 0.10
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)	26,005,372			26,005,372	26,005,372	8,132,353				5,000,000		5,000,000			3,100,000
Proceeds from Issuance of Convertible Preferred Stock (in Dollars)					$ 2,833,000			$ 1,100,000	$ 2,000,000	$ 1,800,000					$ 1,000,000
Stock Issuance Costs (in Dollars)										200,000					100,000
Convertible Preferred Stock, Shares Reserved for Future Issuance										10,000,000	3,000,000			13,300,000	6,300,000	13,300,000	13,300,000
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)	$ 0.0001			$ 0.0001	$ 0.0001		$ 0.0001			$ 1,000					$ 1,000
Initial Conversion Price (in Dollars per share)	$ 0.20			$ 0.20	$ 0.20					$ 0.20					$ 0.17				$ 0.08
Investment Warrants, Exercise Price (in Dollars per share)	$ 0.20									$ 0.20					$ 0.17					$ 0.10
Proceeds from Issuance of Warrants (in Dollars)		4,600,000	7,100,000		600,000										300,000
Dividends, Preferred Stock (in Dollars)				$ 1,200,000	$ 1,200,000					$ 1,200,000				$ 400,000		$ 800,000	$ 800,000
Conversion of Stock, Shares Converted	1,764
Convertible Preferred Stock, Shares Issued upon Conversion	3,100,000			3,100,000	3,100,000					8,800,000
Series A Convertible Preferred Stock Outstanding, Number	236			236	236
Preferred Stock, Shares Outstanding	1,065			1,065	1,065					236			0	1,065		1,065	1,065	0