STOCK-BASED COMPENSATION, Employee Stock Purchase Plan (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
General and Administrative Expense [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Charges to expense	$ 5,000	$ 8,000	$ 10,000	$ 14,000
Research and Development Expense [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Charges to expense	15,000	21,000	35,000	35,000
Employee Stock Purchase Plan (ESPP) [Member]
Employee Stock Ownership Plan (ESOP) Disclosures [Line Items]
Reserved for issuance (in shares)	1,000,000		1,000,000
Purchase period (in months)			three
Percentage of market value (in hundredths)			8500.00%
Maximum allocation of base compensation (in hundredths)			1000.00%
Maximum shares per purchase date (in shares)			12,500
Maximum value per calendar year, per employee			25,000
Common stock issued (in shares)			4,461	5,525
Proceeds from common stock issued			$ 137,000	$ 154,000