FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 31, 2012

Fair Value Disclosures [Abstract]

Schedule of fair value hierarchy for financial assets measured at fair value on a recurring basis

	Level 1		Level 2		Level 3		Total
December 31, 2012:
Available for sale securities:
Money market funds(1)	$	5,003	$	—	$	—	$	5,003
December 31, 2011:
Available for sale securities:
Money market funds(1)	$	9,237	$	—	$	—	$	9,237
Accrued contingent consideration(2)	$	—	$	—	$	4,626	$	4,626

(1)   Included in “Cash and cash equivalents” in the consolidated balance sheets as of December 31, 2012 and 2011 in addition to $23.6 million and $20.6 million, respectively, of cash. Unrealized gains and losses on money market funds were nominal due to the short-term nature of the investments.

(2)   The fair value of accrued contingent consideration was calculated by discounting the known settlement amount of $5.0 million using the borrowing rate from our credit facility.

Schedule of changes in finanacial assets accrued contingent consideration

Balance, January 1, 2011	$	—
Accrued contingent consideration from Voxel purchase, less fair value adjustment		4,626
Balance, December 31, 2011		4,626
Fair value adjustments		374
Payment, gross of settlement adjustment of $250 (note 9)		(5,000	)
Balance, December 31, 2012	$	—

Schedule of fair value of term loan and revolving credit facility

	December 31,
	2012					2011
		Carrying Amount		Fair Value			Carrying Amount		Fair Value
Term loan		$	65,500	$	65,180		$	58,750	$	58,571
Revolving credit facility			30,501		30,342			100		100
Other liabilities			350		363			501		509