Accumulated Other Comprehensive Income (Loss) - Component of Changes in Accumulated Other Comprehensive Income (Loss), Net of Tax (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning, balance	$ (59)
Other comprehensive loss before reclassifications	46
Amounts reclassified from accumulated other comprehensive loss
Net current period other comprehensive income (loss)	46	6
Ending, balance	(13)
Unrealized Gains on Available for Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning, balance	(22)
Other comprehensive loss before reclassifications	51
Amounts reclassified from accumulated other comprehensive loss
Net current period other comprehensive income (loss)	51
Ending, balance	29
Translation Adjustments [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning, balance	(37)
Other comprehensive loss before reclassifications	(5)
Amounts reclassified from accumulated other comprehensive loss
Net current period other comprehensive income (loss)	(5)
Ending, balance	$ (42)