Prepaid Expenses and Other Current Assets

12 Months Ended

Dec. 31, 2019

4.	Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consisted of the following (in thousands):

	December 31,
	2019		2018
Prepaid research and development services	$	3,043	$	245
Prepaid insurance		252		200
Other prepaid expenses		19		20
NOL sale receivable (see Note 10)		—		6,732
Other current assets		674		54
Total prepaid expenses and other current assets	$	3,988	$	7,251