Note G - Accumulated Other Comprehensive (Loss) Income (Detail) - Accumulated Other Comprehensive (Loss) Income by Component (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013		Mar. 31, 2012		Dec. 31, 2012
Foreign currency translation
Balance at beginning of period	$ (419)		$ 345
Foreign currency translation adjustments (1)	(263)	[1]	34	[1]
Balance at end of period	(682)		379
Available-for-sale marketable securities
Balance at beginning of period	27		36
Net unrealized holding gain (2)		[2]	24	[2]
Deferred income taxes (2)		[2]	(9)	[2]
Total other comprehensive income			15
Balance at end of period	27		51
Total accumulated other comprehensive (loss) income	$ (655)		$ 430		$ (392)

[1] In all periods presented, there were no tax impacts related to rate changes and no amounts were reclassified to earnings.

[2] In all periods presented, there were no realized holding gains or losses and therefore no amounts were reclassified to earnings.