Subsequent Event	3 Months Ended
Mar. 31, 2017
Subsequent Events [Abstract]
Subsequent Event	14. SUBSEQUENT EVENT On April 14, 2017, the Company entered into a Controlled Equity Offering Sales Agreement with Cantor Fitzgerald & Co. (“Cantor”) acting as sales agent. Under the ATM Offering, the Company may from time to time sell shares of its common stock having an aggregate offering amount up to $30.0 million in “at-the-market” offerings, which shares are registered under a registration statement on Form S-3, which was declared effective on March 9, 2017. The Company pays Cantor a commission equal to 2.5% of the gross proceeds from the sale of any shares pursuant to the ATM Offering. As of May 11, 2017, the Company had sold 20,413 shares of common stock for net proceeds of $37,152 million under the ATM Offering. As a result, the Company had approximately $30.0 million remaining available for future sales under the ATM Offering.

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.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 855
-URI http://asc.fasb.org/topic&trid=2122774

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