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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2017

Summary of Common Stock Reserved for Future Issuance

The following table presents common stock reserved for future issuance for the following equity instruments as of December 31, 2017 and 2016 (in thousands):



	December 31,
	2017	2016
Stock options and restricted stock units outstanding	3,651	3,388
Warrants to purchase common stock	38	1,975
Available for future issuance under equity and purchase plans	872	952
	4,561	6,315

- Definition

Tabular disclosure of an entity's stock, including par or stated value per share, number and dollar amount of share subscriptions, shares authorized, shares issued, shares outstanding, number and dollar amount of shares held in an employee trust, dividend per share, total dividends, share conversion features, par value plus additional paid in capital, the value of treasury stock and other information necessary to a fair presentation, and EPS information. Stock by class includes common, convertible, and preferred stocks which are not redeemable or redeemable solely at the option of the issuer. Includes preferred stock with redemption features that are solely within the control of the issuer and mandatorily redeemable stock if redemption is required to occur only upon liquidation or termination of the reporting entity. If more than one issue is outstanding, state the title of each issue and the corresponding dollar amount; dollar amount of any shares subscribed but unissued and the deduction of subscriptions receivable there from; number of shares authorized, issued, and outstanding.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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+ Details