Segment Information - Summary of Revenue by Geographic Region (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 11,536	$ 11,115	$ 10,555	$ 8,307	$ 20,091	$ 19,942	$ 17,003	$ 10,207	$ 41,513	$ 67,243	$ 134,000
China [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									14,844	3,893	3,877
Australia [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									10,368	12,494	14
Taiwan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									7,361	5,663	50,006
United States [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									4,444	11,104	12,253
Korea [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									2,214	19,862	51,461
France [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									122	8,482	359
Japan [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									309	2,999	11,362
Other [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									$ 1,851	$ 2,746	$ 4,668