Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2012

Summary Of Significant Accounting Policies [Abstract]

Schedule Of Warranty

	Year Ended December 31
		2012		2011
Beginning balance	$	634,000	$	616,000
Amounts charged to expense		217,000		258,000
Actual warranty costs paid		(261,000)		(240,000)
Ending balance	$	590,000	$	634,000

Components Of Accumulated Other Comprehensive Income

	December 31
		2012		2011
Foreign currency translation	$	(2,370,474)	$	(337,597)
Unrealized gain on available-for-sale investments		23,590		(2,633)
Minimum pension liability		1,758,836		447,836
	$	(588,048)	$	107,606