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ALSCRT Amendment	12 Months Ended
ALSCRT Amendment	Dec. 31, 2011
ALSCRT Amendment [Abstract]
ALSCRT Amendment	15. ALSCRT Amendment Pursuant to an amendment signed between the Company and the beneficiary of the ALSCRT on August 6, 2009, the Company was released from all restrictions on the use of any proceeds previously paid to the Company in connection with the arrangement. As a result, the Company recognized $6.7 million as service revenue in the third quarter of 2009, which represented the remaining deferred revenue and previously un-recognized portion of the value received.