XML 37 R37.htm IDEA: XBRL DOCUMENT v2.4.0.8
Nature of Business and Significant Accounting Policies - Additional Information (Detail) (USD $)
 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
Sep. 30, 2011
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Nature Of Business And Significant Accounting Policies [Line Items]                        
Net loss $ (21,306,000) $ (5,093,000) $ (7,892,000) $ (9,122,000) $ (14,912,000) $ (31,933,000) $ (4,500,000) $ (37,921,000)   $ (43,413,000) $ (89,266,000) $ (24,892,000)
Cash, cash equivalents and short-term marketable securities 19,500,000                 19,500,000    
Restricted marketable securities 2,566,000       0         2,566,000 0  
Working capital 40,900,000                 40,900,000    
Maturity period of cash and cash equivalents                   3 months    
Maturity period of marketable securities                   3 months    
Goodwill impairment           13,200,000   6,600,000 3,300,000   19,800,000 3,300,000
Revenue recognition                   $ 0 $ 0 $ 0
Recognized income tax position                   50.00%    
Developed technologies [Member]
                        
Nature Of Business And Significant Accounting Policies [Line Items]                        
Period of amortization                   1 year    
Trade name [Member]
                        
Nature Of Business And Significant Accounting Policies [Line Items]                        
Period of amortization                   3 years    
Minimum [Member]
                        
Nature Of Business And Significant Accounting Policies [Line Items]                        
Property and equipment useful lives                   18 months    
Period of warranty                   1 year    
Maximum [Member]
                        
Nature Of Business And Significant Accounting Policies [Line Items]                        
Property and equipment useful lives                   5 years    
Period of warranty                   3 years