INCOME TAXES INCOME TAXES - Deferred Tax Assets and Liabilities (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards	$ 159,859,000	$ 154,953,000	[1]
Reserves not currently deductible	7,919,000	10,691,000
Tax credit carryforwards	2,043,000	985,000
Depreciation	3,866,000	4,969,000
Deferred revenue	927,000	751,000
Research and development capitalization	0	17,000
Other	770,000	1,000
Total deferred tax asset	175,384,000	172,367,000
Valuation allowance	(175,300,000)	(172,367,000)	[1]
Net deferred tax asset	84,000	0
Deferred tax liability	(562,000)	0
Net deferred tax asset (liability)	(478,000)	0
Deferred Tax Assets, operating loss carryforwards adjustment		1,700,000
Deferred tax assets, valuation allowance adjustment		$ 1,700,000

[1] 2011 deferred tax balances have been revised to decrease the net operating loss carryforwards and valuation allowance by $1.7 million with no impact on net deferred tax assets. The revision was made to correct previously reported amounts and is not considered to be material.