Valuation and Qualifying accounts

12 Months Ended

Dec. 31, 2013

Valuation and Qualifying Accounts [Abstract]

Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]

16. Valuation and Qualifying Accounts (in thousands)

	Balance at Beginning of Period		Charged/ (Credited) to Revenues and Expenses			Write-Off of Previously Provided Accounts		Balance at End of Period
Year Ended December 31, 2014:
Allowance for Doubtful Accounts	$	353	$	(46	)	$	250	$	57
Allowance for Customer Returns and Sales Credits	$	530	$	3,729		$	3,858	$	401
Year Ended December 31, 2013:
Allowance for Doubtful Accounts	$	430	$	55		$	132	$	353
Allowance for Customer Returns and Sales Credits	$	429	$	5,375		$	5,274	$	530
Year Ended December 31, 2012:
Allowance for Doubtful Accounts	$	390	$	48		$	8	$	430
Allowance for Customer Returns and Sales Credits	$	1,411	$	4,265		$	5,247	$	429

16. Valuation and Qualifying Accounts (in thousands)

	Balance at Beginning of Period		Charged/ (Credited) to Revenues and Expenses			Write-Off of Previously Provided Accounts		Balance at End of Period
Year Ended December 31, 2014:
Allowance for Doubtful Accounts	$	353	$	(46	)	$	250	$	57
Allowance for Customer Returns and Sales Credits	$	530	$	3,729		$	3,858	$	401
Year Ended December 31, 2013:
Allowance for Doubtful Accounts	$	430	$	55		$	132	$	353
Allowance for Customer Returns and Sales Credits	$	429	$	5,375		$	5,274	$	530
Year Ended December 31, 2012:
Allowance for Doubtful Accounts	$	390	$	48		$	8	$	430
Allowance for Customer Returns and Sales Credits	$	1,411	$	4,265		$	5,247	$	429