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SUBSEQUENT EVENT	3 Months Ended
	Mar. 31, 2018
Subsequent Events [Abstract]
SUBSEQUENT EVENT	5. SUBSEQUENT EVENT In April 2018, we completed the sale of the remaining common stock subject to the 2015 Sales Agreement and issued an aggregate of 12,418,318 shares of our common stock, resulting in net cash proceeds to us of approximately $46,098,000 after deducting sales commissions and offering expenses payable by us. In connection with the sale of our common stock under the 2015 Sales Agreement, deferred issuance costs of $50,000 have been included in other assets on our condensed balance sheet as of March 31, 2018. No further shares of common stock may be sold under the 2015 Sales Agreement. For further discussion of the 2015 Sales Agreement, see Note 4 on Stockholders’ Equity.

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- Definition

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.

+ References

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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