Earnings Per Share - (Tables)

6 Months Ended

Jun. 30, 2018

Earnings Per Share [Abstract]

Schedule of Potentially Issuable Common Shares not Included in 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 June 30, 2018 and December 31, 2017 (in thousands):

	June 30,	December 31,
	2018	2017
Shares issuable upon the release of restricted stock awards	16	24
Shares issuable upon exercise of stock options	8,093	7,328
	8,109	7,352