Net Loss Per Common Share (Tables)

3 Months Ended

Mar. 31, 2019

Earnings Per Share [Abstract]

Schedule of Outstanding Options Excluded from Computation of Diluted Loss Per Share

Outstanding options excluded from the calculation of diluted loss per share for the three months ended March 31, 2019 and 2018 are shown in the chart below:

	Three Months Ended March 31,
(in thousands)	2019		2018
Outstanding options to purchase common stock		2,148		2,037