Certain Significant Estimates (Tables)

12 Months Ended

Dec. 31, 2016

Product Warranty [Member]

Valuation and Qualifying Accounts Disclosure [Line Items]

Valuation and Qualifying Accounts [Table Text Block]

Changes in product warranty were as follows:

In Thousands	2016		2015		2014
Beginning balance	$	847	$	695	$	620
Additions		1,501		1,459		1,156
Deductions		(1,472)		(1,307)		(1,081)
Ending balance	$	876	$	847	$	695

Inventory Valuation Reserves [Member]

Valuation and Qualifying Accounts Disclosure [Line Items]

Valuation and Qualifying Accounts [Table Text Block]

Changes in inventory valuation reserves were as follows:

In Thousands	2016		2015		2014
Beginning balance	$	471	$	537	$	469
Additions		327		470		287
Deductions		(383)		(536)		(219)
Ending balance	$	415	$	471	$	537

Allowance for Doubtful Accounts [Member]

Valuation and Qualifying Accounts Disclosure [Line Items]

Valuation and Qualifying Accounts [Table Text Block]

Changes in allowance for doubtful accounts were as follows:

In Thousands	2016		2015		2014
Beginning balance	$	1,086	$	900	$	1,104
Additions		1,758		159		251
Deductions		(1,934)		27		(455)
Ending balance	$	910	$	1,086	$	900

Customer Allowances [Member]

Valuation and Qualifying Accounts Disclosure [Line Items]

Valuation and Qualifying Accounts [Table Text Block]

Changes in customer allowances for advertising subsidies, volume rebates and catalog allowances were as follows:

In Thousands	2016		2015		2014
Beginning balance	$	2,151	$	2,155	$	2,494
Additions		5,778		5,312		4,747
Deductions		(5,152)		(5,316)		(5,086)
Ending balance	$	2,777	$	2,151	$	2,155