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Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2018

Equity [Abstract]

Common Stock are Reserved for Future Issuance

Shares of common stock reserved for future issuance are as follows (in thousands):

	December 31, 2018
Warrants outstanding	17,698
Stock options outstanding	395
Options reserved for future issuance under the Company’s 2017 Equity Incentive Plan	421
Shares reserved for future issuance under the Employee Stock Purchase Plan	115
Restricted stock units	13
Total reserved for future issuance	18,642

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Common stock are reserved for future issuance.

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