ACCOUNTS PAYABLE AND ACCRUED EXPENSES (Details 1) (USD $)	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Accrued warranty reserve, beginning of period	$ 752,000	$ 2,069,000
Accrual for product warranties issued	313,000	356,000
Product replacements and other warranty expenditures	(107,000)	(438,000)
Expiration of warranties	(252,000)	(171,000)
Accrued warranty reserve, end of period	$ 706,000	$ 1,816,000