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The Company and Summary of Significant Accounting Policies - Additional Information (Details)
 3 Months Ended
Mar. 31, 2018
USD ($)
Gigabit / s
Mar. 31, 2017
USD ($)
Jan. 01, 2018
USD ($)
Dec. 31, 2017
USD ($)
Speed per second of high-speed interface technology of Bandwidth Engine ICs (in giga per second) | Gigabit / s 10      
Maximum specific allowance as percentage of invoice value for problematic customer balances 100.00%      
Allowance for doubtful accounts receivable $ 0     $ 0
Inventory reserves 0 $ 0    
Accumulated deficit $ (224,110,000)     (224,688,000)
Payments from customers 60 days      
Payment terms The Company sells its products both directly to customers and through distributors generally under agreements with payment terms typically less than 60 days      
Deferred revenue, revenue recognized $ 1,400,000      
Impairment of goodwill 0      
Adjustments due to ASC 606 [Member] | ASU 2014-09 [Member]        
Accumulated deficit $ (224,330,000)   $ 230,000 $ 230,000