Fair Value of Financial Assets and Liabilities (Tables)

12 Months Ended

Dec. 31, 2019

Fair Value of Financial Assets and Liabilities

Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis

	Fair Value Measurements as of
	December 31, 2019 Using:
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$		$	45,156	$	—	$	45,156
Liability:
Derivative liability (Note 4)		—		—		12,124		12,124
Total	$	—	$	45,156	$	12,124	$	57,280

	Fair Value Measurements as of
	December 31, 2018 Using:
	Level 1		Level 2		Level 3		Total
Assets:
Cash equivalents:
Money market funds	$	—	$	50,906	$	—	$	50,906
Total	$	—	$	50,906	$	—	$	50,906