SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - PROPERTY AND EQUIPMENT (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Sales price for facility	$ 5.8
Commissions and closing costs on sale of long-lived assets held for sale	0.3
Cash proceeds from sale of facility	$ 5.5
Equipment and furniture [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life		3 years
Equipment and furniture [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life		7 years
Leasehold Improvements [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Useful life		3 years
Leasehold Improvements [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Useful life		15 years