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Subsequent Event	6 Months Ended
	Jun. 30, 2014
Subsequent Events [Abstract]
Subsequent Event	8. Subsequent Event In July 2014, the IND application for MGD007 cleared the 30-day review period by the FDA. This triggered a $5.0 million milestone payment due to the Company by Servier.

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The entire disclosure for significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, catastrophic loss, significant foreign exchange rate changes, loans to insiders or affiliates, and transactions not in the ordinary course of business.

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