Note 9. Note Payable - Related Party (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended
	Dec. 21, 2010	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2012	Sep. 28, 2012	Aug. 31, 2012	Dec. 31, 2011	Mar. 31, 2011	Dec. 31, 2010	Dec. 08, 2010	Dec. 12, 2005
Line of Credit Facility, Maximum Borrowing Capacity	$ 3,000,000	$ 3,000,000		$ 3,000,000				$ 3,000,000
Line of Credit Facility, Amount Outstanding		1,000,000		1,000,000						500,000
Amortization of Deferred Charges	545,000	558,000	40,000	639,000	81,000
Debt Instrument, Interest Rate, Stated Percentage						14.00%
Number of Years													10 years
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)		1.21	0.35	1.21	0.35		0.01		0.35		0.36	1.21
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)		354,546	1,235,877	354,546	1,235,877		881,331		1,235,877		1,498,377
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months		160,000		160,000
Interest Expense		545,000
Warrant Issued in Connection with Credit Agreement [Member]
Number of Years	10 years						10 years
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)											0.01
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)							881,331
Initial Warrant Shares [Member]
Number of Years	5 years
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in Shares)											881,331
Warrants and Rights Outstanding	$ 723,541
Conditional Warrant Shares [Member]
Percent of Fully Diluted Shares											1.00%