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Related Party Transactions (Tables)
6 Months Ended
Jun. 30, 2019
Related Party Transactions [Abstract]  
Summary of Related Party Transactions

Related party balances were comprised of the following (in thousands):

 

 

 

June 30,

 

 

December 31,

 

 

 

2019

 

 

2018

 

Solar Bonds issued to related parties

 

$

100

 

 

$

100

 

Convertible senior notes due to related parties

 

$

2,754

 

 

$

2,674