COMMITMENTS AND CONTINGENCIES (Details) (USD $)	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
COMMITMENTS AND CONTINGENCIES
Contractual commitments for supply of services, labor and materials	$ 7,900,000
Future minimum lease payments under non-cancelable operating leases
2014 (remainder of the year)	2,709,000
2015	3,838,000
2016	3,953,000
2017	2,984,000
2018	588,000
Thereafter	3,891,000
Total	17,963,000
Expected minimum sublease rentals to be received	1,500,000
Rental expense under operating leases	$ 867,000	$ 818,000