Note 10 - Commitments and Contingencies (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			39 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Dec. 31, 2012	Mar. 31, 2013 Contingent Payment, Project Annual Billings, Percentage [Member]	Mar. 31, 2013 Contingent Payment, Projected Annual Billings, Period in Months [Member]	Mar. 31, 2013 Not to Exceed Share Price [Member]	Mar. 31, 2013 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
Payments for (Proceeds from) Previous Acquisition	124	35
Business Acquisition, Contingent Consideration, at Fair Value, Current	$ 626		$ 728