Note 6 - Notes Payable (Detail) (USD $)				1 Months Ended		12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 19, 2008	Jul. 31, 2010 Term Loan MIV Acquisition [Member]	Jul. 31, 2010 Term Loan OCS Acquisition [Member]	Dec. 31, 2012 Revolving Credit Facility [Member]	Mar. 31, 2008 Revolving Credit Facility [Member]	Dec. 31, 2006 Revolving Credit Facility [Member]
Debt Instrument, Face Amount			$ 9,000,000	$ 6,900,000	$ 10,000,000
Debt Instrument, Periodic Payment				80,104	121,190
Debt Instrument Balloon Payment Amount				4,800,000	6,700,000
Debt Instrument, Interest Rate, Stated Percentage				3.79%	3.79%
Line of Credit Facility, Maximum Borrowing Capacity	6,500,000	6,500,000					6,500,000	3,500,000
Line of Credit Facility, Borrowing Capacity, Description						75.0%
Line of Credit Facility, Interest Rate at Period End						2.71%
Line of Credit Facility, Remaining Borrowing Capacity						6,500,000
Long-term Debt, Current Maturities	$ 12,400,000