Balance Sheet Detail (Tables)

12 Months Ended

Dec. 31, 2016

Balance Sheet Detail [Abstract]

Balance Sheet Detail [Table Text Block]

In thousands	December 31, 2016			December 31, 2015
Inventories, net:
Raw materials	$	17,273		$	24,898
Work-in-process	15,510			18,284
Finished products	17,692			22,216
Total (net of reserves)	$	50,475		$	65,398
Property, plant, and equipment, net
Machinery and equipment	$	46,581		$	46,369
Leasehold improvements	15,695			15,603
Office equipment and furniture	14,755			14,619
	77,031			76,591
Accumulated depreciation and amortization	(63,162		)	(59,311		)
Total	$	13,869		$	17,280
Other assets:
Deferred compensation plan assets	5,062			4,341
Demonstration and laboratory equipment	4,540			5,022
Other	1,196			996
Total	$	10,798		$	10,359
Accrued expenses:
Accrued payroll-related liabilities	$	11,494		$	6,417
Warranty accrual	1,884			1,586
Capital lease, current portion	504			831
Advanced billings	583			543
Other	3,563			2,769
Total	$	18,028		$	12,146
Other Liabilities:
Deferred compensation plan liabilities	$	6,100		$	5,247
Income tax payable - long term	26			2,523
Asset retirement obligations	2,706			2,540
Postretirement benefits obligation	1,869			2,231
Capital lease - long term	—			575
Deferred service income - long term	1,145			49
Other	610			309
Total	$	12,456		$	13,474

Schedule of Product Warranty Liability [Table Text Block]

Changes in our product liability are as follows:

In thousands	December 31, 2016			December 31, 2015
Balance, beginning of year	$	1,586		$	1,501
Liabilities accrued for warranties issued	2,529			1,896
Warranty claims paid and utilized	(2,137		)	(2,155		)
Changes in accrued warranty liabilities	(94		)	344
Balance, end of year	$	1,884		$	1,586

Deferred Revenue, by Arrangement, Disclosure [Table Text Block]

Changes in our deferred service revenue are as follows:

In thousands	December 31, 2016			December 31, 2015
Balance, beginning of year	$	4,011		$	5,233
Service contracts billed during year	3,891			3,244
Service contract revenue recognized during year	(4,060		)	(4,466		)
Balance, end of year	$	3,842		$	4,011
Balance sheet classification
Service contracts classified as short-term	$	2,697		$	3,962
Service contracts classified as long-term	1,145			49
Balance, end of year	$	3,842		$	4,011

Schedule of Change in Asset Retirement Obligation [Table Text Block]

The following table sets forth an analysis of the ARO activity for the years ended December 31, 2016 and 2015:

In thousands	2016		2015
Balance as of January 1	$	2,540	$	2,397
Accretion expense	166		143
Liabilities incurred	—		—
Balance as of December 31	$	2,706	$	2,540