Annual report pursuant to Section 13 and 15(d)

Organization and Summary of Significant Accounting Policies - Additional Information (Detail)

v3.6.0.2
Organization and Summary of Significant Accounting Policies - Additional Information (Detail)
$ / shares in Units, $ in Thousands
3 Months Ended 12 Months Ended
Oct. 31, 2015
USD ($)
Dec. 31, 2016
USD ($)
employee
$ / shares
Sep. 30, 2016
$ / shares
Jun. 30, 2016
$ / shares
Mar. 31, 2016
$ / shares
Dec. 31, 2016
USD ($)
employee
shares
$ / shares
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Restructuring Cost and Reserve [Line Items]                
New Accounting Pronouncement or Change in Accounting Principle, Effect of Change on Operating Results           $ 8,300    
Restricted Cash and Cash Equivalents   $ 1,800       1,800 $ 1,200  
Standard Product Warranty Accrual, Current   $ 900       $ 900 200  
New Accounting Pronouncement Impact to Basic Earnings-per-share | $ / shares           $ 0.13    
New Accounting Pronouncement Impact to Diluted Earnings-per-share | $ / shares   $ 0.05 $ 0.01 $ 0.04 $ 0.02 $ 0.12    
New Accounting Pronouncement Impact, Incremental Dilutive Share Increase | shares           846,000    
Allowance for Doubtful Accounts Receivable   $ 100       $ 100 200  
Depreciation           10,600 10,800 $ 4,600
Impairment of Intangible Assets (Excluding Goodwill) $ 17,800         $ 1,300 $ 21,600 $ 0
Percentage Of Revenue From Companys Distributors           19.00% 13.00% 28.00%
Term Of Invoice Of Distributor           30 days    
Number of operating segments           1    
Entropic Communications [Member]                
Restructuring Cost and Reserve [Line Items]                
Number of employees terminated | employee   87       87