Note 4. Credit Facility (Detail) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended		12 Months Ended
	Oct. 17, 2012	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2012	Aug. 31, 2012	May 31, 2009
Line of Credit Facility, Maximum Borrowing Capacity							$ 1,500,000
Line of Credit Facility Advance Rate				80.00%
Line of Credit Facility, Current Borrowing Capacity		2,100,000		2,100,000
Debt Instrument, Basis Spread on Variable Rate		1.75%		1.75%		2.25%
Term Loan Minimum Draw Amounts						250,000
Line of Credit Facility, Increase, Additional Borrowings	350,000
Debt Instrument, Covenant Terms, Minimum Tangible Net Worth				18,500,000
Debt Instrument, Covenant Terms, Percentage of Increased Minimum Tangible Net Worth				60.00%
Loans Payable								977,000
Debt Instrument, Payment Terms				36
Interest Expense, Debt		0	4,000	1,000	15,000
Equipment [Member]
Line of Credit Facility, Maximum Borrowing Capacity							1,000,000
Maximum [Member]
Line of Credit Facility, Maximum Borrowing Capacity							$ 3,000,000
Debt Instrument, Covenant Terms, Adjusted Quick Ratio				1.2
Minimum [Member]
Debt Instrument, Covenant Terms, Adjusted Quick Ratio				1.0