COMMITMENTS AND CONTINGENCIES (Details 2) (USD $)	6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Changes in the carrying amount of the Company's total product warranty liability
Balance, beginning of period	$ 983,000	$ 1,071,000
Warranty expense	(122,000)	30,000
Warranty claims	(99,000)	(204,000)
Balance at end of period	762,000	897,000
Activity in the accounts receivable allowance liability
Balance at beginning of year	438,000	489,000
Bad debt expense	231,000	343,000
Write-offs	(35,000)	(3,000)
Balance at end of period	$ 634,000	$ 829,000
Minimum
Warranty Liability
Term of warranty	1 year
Maximum
Warranty Liability
Term of warranty	7 years