Inventories And Warranties (Tables)

3 Months Ended

Mar. 31, 2013

Inventories And Warranties [Abstract]

Schedule Of Inventory Components

(In thousands)	March 31, 2013		December 31, 2012
Raw materials and purchased parts	$	7,451	$	8,152
Work in process		1,317		1,322
Finished goods		3,422		3,059
Total inventories	$	12,190	$	12,533

Schedule Of Changes In Estimated Warranty Liability

	Three Months Ended March 31,
(In thousands)	2013		2012
Balance at beginning of period	$	694	$	985
Accrual for warranties		151		332
Settlements made during the period		(203)		(301)
Balance at end of period	$	642	$	1,016

Schedule Of Changes In Deferred Warranty Revenue

	Three Months Ended March 31,
(In thousands)	2013		2012
Balance at beginning of period	$	582	$	806
Revenue deferrals		94		46
Amortization of deferred revenue		(135)		(105)
Total deferred warranty revenue		541		747
Current portion of deferred warranty revenue		(361)		(482)
Long-term deferred warranty revenue	$	180	$	265