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Common Stock (Tables)

12 Months Ended

Dec. 31, 2017

Equity [Abstract]

Schedule of shares of common stock for the potential exercise of stock options and stock issuance of shares upon vesting of restricted stock units

We have reserved the following shares of common stock for the potential exercise of stock options and issuance of shares upon vesting of restricted stock units (in thousands):

	December 31, 2017			December 31, 2016
Outstanding stock options	5,746			4,611
Outstanding restricted stock units	—			50

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- Definition

Tabular disclosure of shares of common stock reserved for future issuance.

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No definition available.

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