Note K - Contingencies (Detail) (USD $)	3 Months Ended			6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2009	Jun. 30, 2011	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009	Jun. 30, 2012 Minimum [Member] Annual [Member]	Jun. 30, 2012 Minimum [Member] Total [Member]	Jun. 30, 2012 Maximum [Member] Annual [Member]	Jun. 30, 2012 Maximum [Member] Total [Member]
Business Acquisition, Contingent Consideration, Potential Cash Payment							$ 4,000	$ 0	$ 0	$ 4,000	$ 12,000
Business Acquisition, Preacquisition Contingency, Amount					12,000	11,000	10,000
Loss Contingency, Estimate of Possible Loss							2,307
undefined	$ (758,000)	$ 768,000	$ 781,000	$ (758,000)