Balance Sheet Detail (Tables)

12 Months Ended

Dec. 31, 2014

Balance Sheet Detail [Abstract]

Balance Sheet Detail [Table Text Block]

In thousands	December 31, 2014			December 31, 2013
Inventories, net:
Raw materials	$	17,848		$	19,800
Work-in-process	12,377			9,435
Finished products	21,634			18,549
Total (net of reserves)	$	51,859		$	47,784
Property, plant, and equipment, net
Machinery and equipment	$	44,600		$	42,035
Leasehold improvements	15,472			15,434
Office equipment and furniture	14,394			15,229
	74,466			72,698
Accumulated depreciation and amortization	(53,540		)	(50,887		)
Total	$	20,926		$	21,811
Other assets:
Deferred compensation plan assets	4,085			3,242
Demonstration and laboratory equipment	6,296			7,777
Other	636			841
Total	$	11,017		$	11,860
Accrued expenses:
Accrued payroll-related liabilities	$	6,619		$	8,771
Advanced billings	202			2,522
Warranty accrual	1,501			1,142
Capital lease, current portion	796			—
Other	2,184			2,660
Total	$	11,302		$	15,095
Other Liabilities:
Deferred compensation plan liabilities	$	4,919		$	3,874
Income tax payable - long term	2,526			2,574
Asset retirement obligations	2,397			2,248
Postretirement benefits obligation	2,255			1,032
Capital lease - long term	1,406			—
Deferred service income - long term	1,051			1,460
Deferred income tax liabilities - long term	224			125
Other	474			610
Total	$	15,252		$	11,923

Schedule of Product Warranty Liability [Table Text Block]

Changes in our product liability are as follows:

In thousands	December 31, 2014			December 31, 2013
Balance, beginning of year	$	1,142		$	2,273
Liabilities accrued for warranties issued	1,789			1,394
Warranty claims paid and utilized	(2,001		)	(2,665		)
Changes in accrued warranty liabilities	571			140
Balance, end of year	$	1,501		$	1,142

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

Changes in our deferred service revenue are as follows:

In thousands	December 31, 2014			December 31, 2013
Balance, beginning of year	$	5,499		$	6,062
Service contracts billed during year	4,093			5,849
Service contract revenue recognized during year	(4,359		)	(6,412		)
Balance, end of year	$	5,233		$	5,499
Balance sheet classification
Service contracts classified as short-term	$	4,182		$	4,039
Service contracts classified as long-term	1,051			1,460
Balance, end of year	$	5,233		$	5,499

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, 2014 and 2013:

In thousands	2014		2013
Balance as of January 1	$	2,248	$	2,123
Accretion expense	136		125
Liabilities incurred	13		—
Balance as of December 31	$	2,397	$	2,248