Accounts Payable and Accrued Expenses (Tables)

6 Months Ended

Jun. 30, 2016

Accounts Payable and Accrued Liabilities, Current [Abstract]

Schedule of Accounts Payable and Accrued Liabilities

Accounts payable and accrued expenses consist of the following:

	December 31, 2015		June 30, 2016
			(Unaudited)
Accounts payable	$	8,026,000	$	6,768,000
Accrued warranty		614,000		539,000
Accrued compensation		418,000		302,000
Other current liabilities		115,000		151,000
	$	9,173,000	$	7,760,000

Schedule of Product Warranty Liability

The following table summarizes warranty activity for the six-month periods ended June 30, 2015 and 2016:

	Six Months Ended June 30,
	2015			2016
Accrued warranty reserve, beginning of period	$	942,000		$	614,000
Accrual for product warranties issued		196,000			306,000
Product replacements and other warranty expenditures		(72,000	)		(206,000	)
Expiration of warranties		(470,000	)		(175,000	)
Accrued warranty reserve, end of period	$	596,000		$	539,000