Geographic Information and Major Customer and Product Data - Summary of Long-Lived Assets by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013
Long-lived assets by geographic region:
Long-lived assets	$ 2,737	$ 1,856
United States [Member]
Long-lived assets by geographic region:
Long-lived assets	1,006	777
Israel [Member]
Long-lived assets by geographic region:
Long-lived assets	1,600	956
Other [Member]
Long-lived assets by geographic region:
Long-lived assets	$ 131	$ 123