ACCOUNTS RECEIVABLE (Details) (USD $)	Sep. 30, 2012	Dec. 31, 2011
Less:
Allowance for doubtful accounts	$ 14,663,000	$ 15,985,000
Accounts receivable, net	75,074,000	104,305,000
Allowance for sales returns and rebates, change in estimate	1,800,000
Trade Accounts Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, gross	89,737,000	120,290,000
Less:
Allowance for doubtful accounts	(1,482,000)	(2,342,000)
Allowance for Sales Returns Related to Divestiture	(1,484,000)	0
Allowance for sales returns and rebates	(11,697,000)	(13,643,000)
Large solution sales and certain distributor sales excluded from accounts receivable	$ 4,800,000	$ 10,300,000