Schedule of valuation and qualifying

12 Months Ended

Dec. 31, 2017

SCHEDULE OF VALUATION AND QUALIFYING ACCOUNTS [Abstract]

Schedule of valuation and qualifying

SCHEDULE OF VALUATION AND QUALIFYING ACCOUNTS

Description	Balance at		Charged to				Other		Balance
	Beginning of		Costs and				Increases		at end of
	Period		Expenses				(Decreases)		Period
Allowance for doubtful accounts:
Year ended December 31, 2017	$	547,000	$	(48,000	)	$	(26,000	)	$	473,000
Year ended December 31, 2016	$	521,000	$	24,000		$	2,000		$	547,000
Year ended December 31, 2015	$	561,000	$	(44,000	)	$	4,000		$	521,000

Description	Balance at		Charged to			Other		Balance
	Beginning of		Costs and			Increases		at end of
	Period		Expenses			(Decreases)		Period
Allowance for obsolete inventory:
Year ended December 31, 2017	$	1,230,000	$	349,000	$	(831,000	)	$	748,000
Year ended December 31, 2016	$	950,000	$	408,000	$	(128,000	)	$	1,230,000
Year ended December 31, 2015	$	914,000	$	187,000	$	(151,000	)	$	950,000

Description	Balance at		Charged to			Other			Balance
	Beginning of		Costs and			Increases			at end of
	Period		Expenses			(Decreases)			Period
Allowance for deferred taxes:
Year ended December 31, 2017	$	1,086,000	$	216,000		$	304,000		$	1,606,000
Year ended December 31, 2016	$	10,644,000	$	(9,589,000	)	$	31,000		$	1,086,000
Year ended December 31, 2015	$	10,500,000	$	538,000		$	(394,000	)	$	10,644,000