Trade Accounts Receivable (Tables)

6 Months Ended

Jun. 30, 2016

Receivables [Abstract]

Summary of Trade Accounts Receivable

Trade accounts receivable are recorded at the invoiced amount.

	June 30, 2016			December 31, 2015
Trade accounts receivable	$	2,492		$	4,631
Allowance for doubtful accounts		(15	)		(15	)
Trade accounts receivable, net	$	2,477		$	4,616
Unpaid deferred revenue included in trade accounts receivable	$	544		$	2,012

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:

	June 30, 2016			December 31, 2015
Central Banks		41	%		62	%