EQUIPMENT AND LEASEHOLD IMPROVEMENTS (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Equipment and leasehold improvements
Total	$ 14,347		$ 13,623
Less accumulated depreciation and amortization	(9,000)		(8,467)
Equipment and leasehold improvements, net	5,347		5,156
Depreciation and amortization expenses	533	542
Office equipment
Equipment and leasehold improvements
Total	7,791		7,498
Useful lives	3 years
Furniture and fixtures
Equipment and leasehold improvements
Total	2,156		1,730
Useful lives	7 years
Leasehold improvements
Equipment and leasehold improvements
Total	$ 4,400		$ 4,395
Leasehold improvements | Minimum
Equipment and leasehold improvements
Useful lives	5 months
Leasehold improvements | Maximum
Equipment and leasehold improvements
Useful lives	60 months