ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Tables)

3 Months Ended

Mar. 31, 2015

Accounts Payable and Accrued Liabilities, Current [Abstract]

Schedule of Accounts Payable and Accrued Liabilities [Table Text Block]

Accounts payable and accrued expenses consist of the following:

	December 31,		March 31,
	2014		2015
Accounts payable	$	7,190,000	$	10,025,000
Accrued warranty		942,000		854,000
Accrued severance		180,000		120,000
Accrued compensation		1,360,000		409,000
Other current liabilities		430,000		200,000
	$	10,102,000	$	11,608,000

Schedule of Product Warranty Liability [Table Text Block]

The following table summarizes warranty activity for the three-month periods ended March 31, 2014 and 2015:

	Three Months Ended March 31,
	2014		2015
Accrued warranty reserve, beginning of period	$	522,000	$	942,000
Accrual for product warranties issued		19,000		152,000
Product replacements and other warranty expenditures		(17,000)		(22,000)
Expiration of warranties		(57,000)		(218,000)
Accrued warranty reserve, end of period	$	467,000	$	854,000