Note 7 - Credit Facility (Detail) (USD $)	3 Months Ended	12 Months Ended									3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2012	Mar. 31, 2013	Dec. 31, 2012 Maximum [Member]	Dec. 31, 2012 Minimum [Member]	Mar. 31, 2013 Revolving Credit Facility [Member]	Dec. 31, 2012 Revolving Credit Facility [Member]	Aug. 31, 2012 Revolving Credit Facility [Member]	Jul. 31, 2012 Revolving Credit Facility [Member]	Dec. 31, 2012 Equipment Term Loan [Member]	Dec. 31, 2012 Equipment Term Loan [Member]	Dec. 31, 2012 Advance Rate of Elligible Accounts Receivable	Dec. 31, 2011 Term Loan 2009 [Member]	Dec. 31, 2009 Term Loan 2009 [Member]	May 31, 2012 Term Loan 2009 [Member]
Line of Credit Facility, Maximum Borrowing Capacity							$ 2,000,000		$ 3,000,000	$ 1,500,000	$ 1,000,000	$ 1,000,000
Line of Credit Facility, Remaining Borrowing Capacity								2,700,000
Minimum Draw Amount from Term Loan											250,000	250,000
Number of Draws From Credit Facility During a Period											2
Amount Drawn from a Credit Facility During a Period											350,000
Line of Credit Facility, Amount Outstanding											680,000	680,000				0
Debt Instrument, Interest Rate, Stated Percentage											6.25%	6.25%
Term Loan Duration of Payment Periods												30 months			36 months
Adjusted Quick Ratio				1.50%	1.20%	1.00%
Minimum Net Worth Required for Compliance								18,500,000
Percentage of the Sum of Gross Proceeds	60.00%	60.00%	60.00%
Deferred Tax Asset, Valuation Allowance, Addition	19,500,000
Line of Credit Advance Rate Percentage of Eligible Accounts Receivable													80.00%
Line Of Credit Advance Rate Percentage Of Eligible Accounts Receivable Less Principal Outstanding		80.00%
Loans Payable															977,000
Interest Expense, Debt			$ 7,000											$ 17,000