Derivative Liability (Tables)

6 Months Ended

Jun. 30, 2020

Derivative Liability

Schedule of Changes in Fair Value

	Six Months Ended June 30,
		2020		2019
Fair value of Exit Fee derivative liability at January 1	$	969	$	533
Change in estimated fair value of derivative liability		152		61
Fair value of Exit Fee derivative liability at June 30	$	1,121	$	594