Inventories And Warranties (Tables)

9 Months Ended

Sep. 30, 2012

Inventories And Warranties [Abstract]

Schedule Of Inventory Components

(In thousands)	September 30, 2012		December 31, 2011
Raw materials and purchased parts	$	7,536	$	6,893
Work in process		1,728		1,007
Finished goods		3,005		3,152
Total inventories	$	12,269	$	11,052

Schedule Of Changes In Estimated Warranty Liability

	Nine Months Ended September 30,
(In thousands)	2012		2011
Balance at beginning of period	$	985	$	702
Accrual for warranties		616		944
Settlements made during the period		(779)		(752)
Balance at end of period	$	822	$	894

Schedule Of Changes In Deferred Warranty Revenue

	Nine Months Ended September 30,
(In thousands)	2012		2011
Balance at beginning of period	$	806	$	787
Revenue deferrals		181		342
Amortization of deferred revenue		(336)		(350)
Total deferred warranty revenue		651		779
Current portion of deferred warranty revenue		(462)		(574)
Long-term deferred warranty revenue	$	189	$	205