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Summary of Significant Accounting Policies (Tables)
 3 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]  
Disaggregation of Revenue
Revenue is also classified by major product category and is presented below:

For the three months ended December 31,
(in thousands)
 
2018
 
% of Revenue
 
2017
 
% of Revenue
Broadband
 
$
17,327

 
72
%
 
$
20,866

 
87
%
Chips
 
4,215

 
18
%
 
2,151

 
9
%
Navigation
 
2,459

 
10
%
 
1,019

 
4
%
Total revenue
 
$
24,001

 
100
%
 
$
24,036

 
100
%