ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details 1) (USD $)	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Accrued warranty reserve, beginning of period	$ 520,000	$ 752,000
Accrual for product warranties issued	264,000	196,000
Product replacements and other warranty expenditures	(176,000)	(55,000)
Expiration of warranties	(82,000)	(14,000)
Accrued warranty reserve, end of period	$ 526,000	$ 879,000