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Subsequent Event (Details) In Millions, unless otherwise specified	1 Months Ended
	Oct. 31, 2012 USD ($)	Oct. 31, 2012 EUR (€)
Subsequent Event [Abstract]
License agreement term	20 years	20 years
License entry fee	$ 12.5	€ 9.6
Advance royalty payment	12.5	9.6
Royalties due, minimum amount to use prepaid credit		0.5
Credit against future royalty payments, maximum amount		€ 0.5

Carrying amount as of the balance sheet date of amounts paid for royalties in advance of when the expense is to be recognized, which will occur within one year or in the normal operating cycle, if longer.

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