SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013	Dec. 31, 2012
Fair value of assets and liabilities measured on recurring and non-recurring basis
Cash equivalents	$ 26,185,000	$ 35,085,000	$ 18,211,000	$ 23,499,000
Discount rate (as a percent)	2.30%
STA
Fair value of assets and liabilities measured on recurring and non-recurring basis
Contingent consideration liability	4,100,000
Minimum
Fair value of assets and liabilities measured on recurring and non-recurring basis
Incremental borrowing rate used to discount future cash flows from financial instruments (as a percent)	2.65%
Maximum
Fair value of assets and liabilities measured on recurring and non-recurring basis
Incremental borrowing rate used to discount future cash flows from financial instruments (as a percent)	2.74%
Carrying Amount | Level 3
Fair value of assets and liabilities measured on recurring and non-recurring basis
Outstanding borrowings	55,900,000	56,700,000
Fair Value | Level 1 | Money market funds
Fair value of assets and liabilities measured on recurring and non-recurring basis
Cash equivalents	20,000	20,000
Fair Value | Level 3
Fair value of assets and liabilities measured on recurring and non-recurring basis
Outstanding borrowings	55,800,000	56,800,000
Fair Value | Level 3 | STA
Fair value of assets and liabilities measured on recurring and non-recurring basis
Contingent consideration liability	$ 4,100,000	$ 4,100,000