STOCK-BASED COMPENSATION - (Tables)

3 Months Ended

Mar. 31, 2020

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Stock-Based Compensation Expense

The following table shows total stock-based compensation expense included in the Condensed Consolidated Statements of Operations for the three months ended March 31, 2020 and 2019 (in thousands):

	Three Months Ended March 31,
	2020		2019
Research and development	$	2,839	$	2,298
General and administrative	2,781		2,225
Total stock-based compensation expense	$	5,620	$	4,523