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Trade Accounts Receivable (Tables)
3 Months Ended
Mar. 31, 2017
Receivables [Abstract]  
Summary of Trade Accounts Receivable

Trade accounts receivable are recorded at the invoiced amount.

 

 

 

March 31,

 

 

December 31,

 

 

 

2017

 

 

2016

 

Trade accounts receivable

 

$

3,819

 

 

$

5,093

 

Allowance for doubtful accounts

 

 

(15

)

 

 

(15

)

Trade accounts receivable, net

 

$

3,804

 

 

$

5,078

 

Unpaid deferred revenue included in trade accounts

   receivable

 

$

507

 

 

$

2,245

 

 

Customers Who Accounted for 10% or More of Trade Accounts Receivable, Net

Customers who accounted for 10% or more of trade accounts receivable, net are as follows:

 

 

 

March 31,

 

 

December 31,

 

 

 

2017

 

 

2016

 

Central Banks

 

 

60

%

 

 

57

%