Note 10 - Commitments and Contingencies (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended			33 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Sep. 30, 2012 Contingent Payment, Project Annual Billings, Percentage [Member]	Sep. 30, 2012 Contingent Payment, Projected Annual Billings, Period in Months [Member]	Sep. 30, 2012 Not to Exceed Share Price [Member]	Sep. 30, 2012 Number of Days Stock Price Must Trade Above Ceiling to Trigger Additional Fee [Member]
Business Acquisition, Preacquisition Contingency, Description						2.5%	42	$2.00	twenty
Business Acquisition, Preacquisition Contingency, Amount	$ 500		$ 500
Payments for (Proceeds from) Previous Acquisition	51	86	140	255
Business Acquisitions, Purchase Price Allocation, Subsequent Years, Remaining Adjustments					404
Business Acquisition, Contingent Consideration, at Fair Value, Current	$ 842		$ 842