6. FIXED ASSETS

Property, equipment, and leasehold improvements, net consisted of the following:


	March 31,		December 31,
(In thousands)	2021		2020
Computer software and hardware	$	40	$	40
Research and lab equipment		520		520
Leasehold improvements		66		66
Property and equipment		626		626
Less accumulated depreciation		(550)		(541)
Property and equipment, net	$	76	$	85

Depreciation expense for the three months ended March 31, 2021 and 2020, was $9 thousand and $7 thousand, respectively. Maintenance and repairs are charged to expense as incurred and any additions or improvements are capitalized.