Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Sep. 30, 2014		Sep. 30, 2013		Sep. 30, 2014		Sep. 30, 2013		Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Foreign currency translation
Balance at beginning of period					$ 18		$ (419)		$ (340)		$ (142)
Other comprehensive loss:
Foreign currency translation adjustments	(135)	[1]	162	[1]	(493)	[1]	439	[1]
Balance at end of period	(475)		20		(475)		20		(340)		(142)
Available-for-sale marketable securities
Balance at beginning of period					19		27		34		15
Other comprehensive income:
Net unrealized holding gain (loss)	(20)	[2]	4	[2]	5	[2]	(16)	[2]
Deferred income taxes	8	[2]	(2)	[2]	(2)	[2]	6	[2]
Total other comprehensive income	(12)		2		3		(10)
Balance at end of period	22		17		22		17		34		15
Total accumulated other comprehensive loss	$ (453)		$ 37		$ (453)		$ 37			$ 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.