SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - PROPERTY AND EQUIPMENT (Details) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Sales price of long-lived assets held for sale	$ 5,800,000		$ 5,800,000
Commissions and closing costs on sale of long-lived assets held for sale	300,000		300,000
Proceeds from sale of property and equipment	$ 5,500,000	$ 0	$ 5,509,000	$ 493,000
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