Annual report pursuant to Section 13 and 15(d)

Segments - Schedule of Activities with Major Customers (Detail)

v3.3.1.900
Segments - Schedule of Activities with Major Customers (Detail)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
customer
Dec. 31, 2014
USD ($)
Dec. 31, 2013
Segment Reporting [Abstract]      
Number of major customers | customer 3    
Panasonic | Customer Concentration Risk | Consolidated Revenue      
Revenue, Major Customer      
Percent of consolidated revenue 21.00% 17.70% 29.60%
Panasonic | Customer Concentration Risk | Accounts Receivable      
Revenue, Major Customer      
Accounts receivable $ 14,433 $ 21,808  
Apple | Customer Concentration Risk | Consolidated Revenue      
Revenue, Major Customer      
Percent of consolidated revenue 13.10% 17.90% 0.00%
Apple | Customer Concentration Risk | Accounts Receivable      
Revenue, Major Customer      
Accounts receivable $ 0 $ 4,342  
Boeing | Customer Concentration Risk | Consolidated Revenue      
Revenue, Major Customer      
Percent of consolidated revenue 13.00% 14.10% 14.50%
Boeing | Customer Concentration Risk | Accounts Receivable      
Revenue, Major Customer      
Accounts receivable $ 9,598 $ 6,874