Note 4. Credit Facility (Detail) (USD $)		3 Months Ended		12 Months Ended		3 Months Ended
	Mar. 31, 2013 Reduced Amount [Member] Revolving Credit Facility [Member]	Mar. 31, 2013 Maximum [Member] Revolving Credit Facility [Member]	Mar. 31, 2013 Minimum [Member] Revolving Credit Facility [Member]	Dec. 31, 2012 Revolving Credit Facility [Member]	Mar. 31, 2013 Revolving Credit Facility [Member]	Mar. 31, 2013 Term Loan [Member]	Dec. 31, 2012 Term Loan [Member]
Line of Credit Facility, Maximum Borrowing Capacity (in Dollars)	$ 2,000,000				$ 3,000,000
Line of Credit Facility Advance Rate Percentage of Elligible Accounts Receivable					80.00%
Line of Credit Facility Advance Rate Percentage of Elligible Accounts Receivable Less Principal Outstanding					80.00%
Debt Instrument, Basis Spread on Variable Rate					1.75%	2.25%
Term Loan Minimum Draw Amounts (in Dollars)				250,000
Line of Credit Facility, Remaining Borrowing Capacity (in Dollars)					1,400,000
Number of Draws From Credit Facility During the Period							2
Line of Credit Facility Advance (in Dollars)							350,000
Line of Credit Facility, Amount Outstanding (in Dollars)						600,000
Debt Instrument, Interest Rate, Stated Percentage						6.25%
Term Loan Duration of Payments Periods						30 months
Interest Expense, Debt (in Dollars)						$ 10,000
Debt Instrument, Covenant Terms, Adjusted Quick Ratio		1.2	1.0
Minimum Adjusted Quick Ratio					1.5