Inventories And Warranties (Tables)

6 Months Ended

Jun. 30, 2013

Inventories And Warranties [Abstract]

Schedule Of Inventory Components

(In thousands)	June 30, 2013		December 31, 2012
Raw materials and purchased parts	$	7,206	$	8,152
Work in process		1,323		1,322
Finished goods		3,234		3,059
Total inventories	$	11,763	$	12,533

Schedule Of Changes In Estimated Warranty Liability

	Six Months Ended June 30,
(In thousands)	2013		2012
Balance at beginning of period	$	694	$	985
Accrual for warranties		246		466
Warranty revision		4		(14)
Settlements made during the period		(408)		(523)
Balance at end of period	$	536	$	914

Schedule Of Changes In Deferred Warranty Revenue

	Six Months Ended June 30,
(In thousands)	2013		2012
Balance at beginning of period	$	582	$	806
Revenue deferrals		159		94
Amortization of deferred revenue		(259)		(214)
Total deferred warranty revenue		482		686
Current portion of deferred warranty revenue		(307)		(489)
Long-term deferred warranty revenue	$	175	$	197