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Summary of Significant Accounting Policies (Tables)
 6 Months Ended
Mar. 31, 2019
Accounting Policies [Abstract]  
Disaggregation of Revenue
Revenue is also classified by major product category and is presented below:

 
 
For the three months ended March 31,
 
For the six months ended March 31,
(in thousands)
 
2019
 
% of Revenue
 
2018
 
% of Revenue
 
2019
 
% of Revenue
 
2018
 
% of Revenue
Broadband
 
$
14,150

 
65
%
 
$
13,679

 
73
%
 
$
31,477

 
69
%
 
34,545

 
81
%
Chips
 
3,501

 
16
%
 
2,895

 
16
%
 
7,716

 
17
%
 
5,046

 
12
%
Navigation
 
4,094

 
19
%
 
2,049

 
11
%
 
6,553

 
14
%
 
3,068

 
7
%
Total revenue
 
$
21,745

 
100
%
 
$
18,623

 
100
%
 
$
45,746

 
100
%
 
$
42,659

 
100
%