Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013		Dec. 31, 2013
Foreign currency translation
Balance at beginning of period	$ (491)		$ (682)		$ 18		$ (419)
Other comprehensive loss:
Foreign currency translation adjustments	151	[1]	540	[1]	(358)	[1]	277	[1]
Balance at end of period	(340)		(142)		(340)		(142)
Available-for-sale marketable securities
Balance at beginning of period	47		27		19		27
Other comprehensive income:
Net unrealized holding gain (loss)	(22)	[2]	(20)	[2]	24	[2]	(20)	[2]
Deferred income taxes	9	[2]	8	[2]	(9)	[2]	8	[2]
Total other comprehensive income	(13)		(12)		15		(12)
Balance at end of period	34		15		34		15
Total accumulated other comprehensive loss	$ (306)		$ (127)		$ (306)		$ (127)		$ 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.