Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Summary of Significant Accounting Policies [Abstract]

Schedule of Warranty

	Year Ended December 31
		2018		2017
Beginning balance	$	603,000	$	600,000
Amounts charged to expense		77,000		93,000
Actual warranty costs paid		(86,000)		(90,000)
Ending balance	$	594,000	$	603,000

Components of Accumulated Other Comprehensive Loss

	Foreign Currency Translation		Unrealized (loss)/gain on securities		Accumulated Other Comprehensive Loss
December 31, 2017	$	(625,000)	$	12,000	$	(613,000)
Net current period change		(139,000)		1,000		(138,000)
December 31, 2018	$	(764,000)	$	13,000	$	(751,000)