INCOME TAXES - Effective Tax Rate Reconciliation (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Federal statutory income tax rate (in hundredths)	35.00%
Income tax reconciliation [Abstract]
Tax at federal statutory rate	$ (1,259,000)	$ (5,308,000)	$ (16,292,000)
State taxes, net	(1,285,000)	(1,289,000)	(1,136,000)
Non-deductible stock compensation	980,000	327,000	3,470,000
Non-deductible acquisition costs	0	0	410,000
Foreign rate differential	1,567,000	3,245,000	4,353,000
Research credits	(548,000)	(930,000)	0
Change in valuation allowance	556,000	4,961,000	(26,795,000)
Other	225,000	155,000	137,000
Income tax provision (benefit)	236,000	1,161,000	(35,853,000)
Change in valuation amount	$ 200,000	$ 300,000	$ 37,100,000