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Segment Information (Tables)
6 Months Ended
Jun. 30, 2017
Segment Reporting [Abstract]  
Schedule of Revenue by Geographic Region
Revenue by geographic region, is as follows:
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2017
 
2016
 
2017
 
2016
Japan
$
18,167

 
$
10,506

 
$
33,361

 
$
19,952

Taiwan
2,229

 
1,235

 
6,097

 
2,269

China
320

 
316

 
596

 
497

Europe
5

 
141

 
1,941

 
300

Korea

 
241

 
787

 
415

United States

 
9

 
121

 
54

Other

 
132

 
528

 
260

 
$
20,721

 
$
12,580

 
$
43,431

 
$
23,747

Schedule of Revenue from Significant Customers
The percentage of revenue attributable to our distributors, top five end customers, and individual distributors or end customers that represented 10% or more of revenue in at least one of the periods presented, is as follows:
 
Three Months Ended
 
Six Months Ended
 
June 30,
 
June 30,
 
2017
 
2016
 
2017
 
2016
Distributors:
 
 
 
 
 
 
 
All distributors
41
%
 
55
%
 
49
%
 
47
%
Distributor A
30
%
 
35
%
 
29
%
 
28
%
End customers: 1
 
 
 
 
 
 
 
Top five end customers
87
%
 
82
%
 
75
%
 
83
%
End customer A
51
%
 
42
%
 
43
%
 
50
%
End customer B
15
%
 
11
%
 
10
%
 
10
%
End customer C
9
%
 
11
%
 
8
%
 
7
%
End customer D
5
%
 
13
%
 
9
%
 
10
%

1 
End customers include customers who purchase directly from us, as well as customers who purchase our products indirectly through distributors.
Schedule of Accounts Receivable Percentage from Significant Customers
The following accounts represented 10% or more of total accounts receivable in at least one of the periods presented:
 
June 30,
2017
 
December 31,
2016
Account X
80
%
 
54
%
Account Y
11
%
 
5
%