Stockholders' Equity - Changes in Accumulated Other Comprehensive Income (Detail) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ 112
Other comprehensive income before reclassifications	5
Amounts reclassified from accumulated other comprehensive income	0
Net current period other comprehensive income	5
Ending Balance	117
Unrealized Gains and Losses on Available-for Sale Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	11
Other comprehensive income before reclassifications	5
Amounts reclassified from accumulated other comprehensive income	0
Net current period other comprehensive income	5
Ending Balance	16
Foreign Currency Items [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	101
Other comprehensive income before reclassifications	0
Amounts reclassified from accumulated other comprehensive income	0
Net current period other comprehensive income	0
Ending Balance	$ 101