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Subsequent Event	12 Months Ended
	Dec. 31, 2017
Subsequent Events [Abstract]
Subsequent Event	(11) Subsequent Event Subsequent to December 31, 2017, the Company sold an aggregate of 2,133,828 shares of its Common Stock pursuant to the terms of the Sales Agreement for aggregate gross proceeds of approximately $3.5 million and net proceeds of $3.4 million, including expenses for executing the “at the market offering” and commissions to the placement agent. As of January 19, 2018, the Company has sold all shares available under its prospectus to the Company’s registration statement on Form S-3 (No. 333-217459) and does not currently anticipate making any additional sales under this Sales Agreement.

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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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