Accounts Receivable and Sales Concentrations

12 Months Ended

Dec. 31, 2017

Receivables [Abstract]

Accounts Receivable and Sales Concentrations

Note 5. Accounts Receivable and Sales Concentrations

Accounts receivable, net, are comprised of the following amounts:

	As of December 31,
	2017		2016
Trade	$	110,165	$	94,502
Less - allowance for doubtful accounts		1,719		1,069
Accounts receivable, net	$	108,446	$	93,433

The following table presents activity in the allowance for doubtful accounts.

	Balance at Beginning of Year		Additions		Write- offs			Currency Impacts			Balance at End of Year
Year Ended December 31, 2017	$	1,069	$	648	$	(101	)	$	103		$	1,719
Year Ended December 31, 2016	$	1,055	$	153	$	(59	)	$	(80	)	$	1,069
Year Ended December 31, 2015	$	362	$	729	$	(8	)	$	(28	)	$	1,055

No customers accounted for more than 10% of our net sales in 2017. For the years ended December 31, 2016 and 2015, sales to Robert Bosch Automotive Systems (“Bosch”) amounted to $59.2 million, and $73.0 million, respectively, or 10%, and 18% of consolidated net sales, respectively. All revenues related to Bosch are in the APC segment. No customers represented more than 10% of accounts receivable as of December 31, 2017 or 2016.