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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