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Subsequent Events	9 Months Ended
	Sep. 30, 2013
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events Subsequent to September 30, 2013, Roche made the upfront payment of $10.0 million to the Company due from the Collaboration, Option and License Agreement. Subsequent to September 30, 2013, the Company sold 348,995 shares of common stock under its ATM Sales Agreement for net proceeds of $782,000. Subsequent to September 30, 2013, warrants to purchase 375,000 shares of common stock were exercised for total proceeds to the Company of $298,000.

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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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