Note 9 - Commitments and Contingencies (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended			36 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Contingent Payment, Project Annual Billings, Percentage [Member]	Dec. 31, 2012 Contingent Payment, Projected Annual Billings, Period in Months [Member]	Dec. 31, 2012 Not to Exceed Share Price [Member]	Dec. 31, 2012 Number of Days Stock Price Must Trade Above Ceiling to Trigger Additional Fee [Member]
Operating Leases, Rent Expense	$ 641	$ 779	$ 830
Business Acquisition, Preacquisition Contingency, Description				2.5%	42	$2.00	twenty
Business Acquisition, Preacquisition Contingency, Amount	500
Payments for (Proceeds from) Previous Acquisition	186	304	519
Business Combination, Contingent Consideration Arrangements, Change in Amount of Contingent Consideration, Liability	$ 102	$ 411