Balance Sheet Detail (Tables)

3 Months Ended

Mar. 31, 2022

Balance Sheet Detail

Schedule of property and equipment

	March 31,		December 31,
	2022		2021
Research and development equipment	$	158	$	158
Office equipment		63		63
Total property and equipment		221		221
Less accumulated depreciation		(123)		(111)
Property and equipment, net	$	98	$	110

Schedule of accrued liabilities

	March 31,		December 31,
	2022		2021
External research and development expenses	$	446	$	854
Payroll related		174		376
Professional services		37		59
Other		36		12
Total	$	693	$	1,301