Note 8. Note Payable (Detail) (USD $)	1 Months Ended
	Aug. 31, 2012	Sep. 30, 2012	Dec. 21, 2010
Line of Credit Facility, Increase, Additional Borrowings (in Dollars)	$ 1,000,000
Debt Instrument, Unamortized Discount (in Dollars)	114,000
Debt Instrument, Convertible, Remaining Discount Amortization Period	42 months
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 3,000,000	$ 3,000,000	$ 3,000,000
Debt Instrument, Basis Spread on Variable Rate	2.15%
Line of Credit Facility, Interest Rate During Period	6.15%
Debt Instrument, Payment Terms	42
Minimum Liquidity Ratio		1.25
Loan and Security Agreement [Member]
Debt Instrument, Basis Spread on Variable Rate	1.90%
Line of Credit Facility, Interest Rate During Period	5.65%
Maximum [Member]
Line of Credit Facility, Interest Rate During Period	5.90%
Minimum [Member]
Minimum Liquidity Ratio		1.0
Above Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	2.40%