Note 10. Stock Warrants (Detail)	Sep. 30, 2012	Sep. 28, 2012	Dec. 31, 2011	Sep. 30, 2011	Dec. 31, 2010	Dec. 08, 2010	Dec. 12, 2005	Sep. 28, 2012 Warrant Issued in Connection with Credit Agreement [Member]	Dec. 31, 2010 Warrant Issued in Connection with Credit Agreement [Member]	Dec. 21, 2010 Warrant Issued in Connection with Credit Agreement [Member]	Feb. 25, 2011 Warrants Issued in Connection with Private Placement Offering [Member]	Dec. 02, 2009 Warrants Issued in Connection with Private Placement Offering [Member]	Mar. 13, 2009 Warrants Issued in Connection with Private Placement Offering [Member]	Feb. 25, 2011 Cashless Exercise of Warrants [Member]	Dec. 02, 2009 Cashless Exercise of Warrants [Member]	Dec. 08, 2010 First Placement Agent [Member]	Dec. 08, 2010 Second Placement Agent [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights	354,546	881,331	1,235,877	1,235,877	1,498,377			881,331			262,500	87,500	350,000			338,182	16,364
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)	1.21	0.01	0.35	0.35	0.36	1.21			0.01				0.41
Number of Years							10 years	10 years		10 years
Common Stock, Shares, Issued														200,646	51,681