Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013		Dec. 31, 2013
Foreign currency translation
Balance at beginning of period	$ 18		$ (419)
Other comprehensive loss:
Foreign currency translation adjustments	(509)	[1]	(263)	[1]
Balance at end of period	(491)		(682)
Available-for-sale marketable securities
Balance at beginning of period	19		27
Other comprehensive income:
Net unrealized holding gain (loss)	46	[2]	0	[2]
Deferred income taxes	(18)	[2]	0	[2]
Total other comprehensive income	28		0
Balance at end of period	47		27
Total accumulated other comprehensive loss	$ (444)		$ (655)		$ 37

[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.