Loss Per Share (Tables)

12 Months Ended

Dec. 31, 2019

Earnings Per Share [Abstract]

Schedule of Potentially Issuable Common Shares Excluded from Computation of Diluted Net Loss Per Share

The following potentially issuable common shares were not included in the computation of diluted net loss per share because they would have an anti-dilutive effect due to net losses at of the following at December 31 (in thousands):

	2019	2018	2017
Shares issuable upon the release of restricted stock awards	14	76	24
Shares issuable upon exercise of stock options	10,133	8,091	7,328
	10,147	8,167	7,352