Accounts Payable and Accrued Expenses (Tables)

9 Months Ended

Sep. 30, 2017

Payables and Accruals [Abstract]

Schedule of Accounts Payable and Accrued Liabilities

Accounts payable and accrued expenses consist of the following:

	December 31, 2016		September 30, 2017
			(Unaudited)
Accounts payable	$	6,195,000	$	7,417,000
Accrued warranty		472,000		450,000
Accrued severance		609,000		202,000
Accrued compensation		297,000		502,000
Other current liabilities		49,000		66,000
	$	7,622,000	$	8,637,000

Schedule of Product Warranty Liability

The following table summarizes warranty activity for the nine-month periods ended September 30, 2016 and 2017:

	Nine Months Ended September 30,
	2016			2017
Accrued warranty reserve, beginning of period	$	614,000		$	472,000
Accrual for product warranties issued		387,000			118,000
Product replacements and other warranty expenditures		(245,000	)		(48,000	)
Expiration of warranties		(248,000	)		(92,000	)
Accrued warranty reserve, end of period	$	508,000		$	450,000