Net Loss Per Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Summary of Shares Underlying Outstanding Options and Warrants were Excluded from Computation of Basic and Diluted Net Loss Per Share

The following shares underlying outstanding options, restricted stock units and warrants were excluded from the computation of basic and diluted net loss per share for the periods presented (in thousands):

	Three Months Ended March 31,
	2019	2018
Options to purchase common stock	4,837	5,665
Restricted stock units	1,207	1,018
Common stock warrants	907	357