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Subsequent Events	6 Months Ended
Subsequent Events	Jun. 30, 2012
Subsequent Events [Abstract]
Subsequent Events	*14. Subsequent Events* On July 30, 2012, the Company gave irrevocable notice to borrow an additional $2.5 million on August 14, 2012 based on the achievement of certain milestones related to Niobe system sales in 2012 in accordance with the Cowen loan agreement.