Allowance for Doubtful Accounts Receivable and Sales Returns

3 Months Ended

Mar. 31, 2012

Allowance for Doubtful Accounts Receivable and Sales Returns

Note 7. Allowance for Doubtful Accounts Receivable and Sales Returns

Activity in the allowance for doubtful accounts receivable and sales returns is as follows (in thousands):

	Allowance For
	Doubtful Accounts Receivable			Sales Returns
Balances, December 31, 2011	$	1,445		$	668
Addition (reduction) to allowance		(283	)		347
Amounts written off		(1	)		(136	)
Foreign currency translation		26			(0	)
Balances, March 31, 2012	$	1,187		$	879

No customers accounted for 10% or more of trade accounts receivable as of March 31, 2012. As of December 31, 2011, one customer accounted for 17% of trade accounts receivable. No one customer accounted for more than 10% of total revenue during the quarters ended March 31, 2012 and 2011.