6. FIXED ASSETS

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


	September 30,		December 31,
(In thousands)	2020		2019
Computer software and hardware	$	28	$	131
Research and lab equipment		520		520
Leasehold improvements		66		66
Property and equipment		614		717
Less accumulated depreciation		(531)		(644)
Property and equipment, net	$	83	$	73

Depreciation expense for the three and nine months ended September 30, 2020, was $5 thousand, and $19 thousand, respectively. Depreciation expense for the three and nine months ended September 30, 2019, was $9 thousand, and $31 thousand, respectively. Maintenance and repairs are charged to expense as incurred and any additions or improvements are capitalized.

During the three and nine months ended September 30, 2020 the Company wrote off $131 thousand of fully depreciated computer software and hardware assets that were no longer in use. The Company did not write off any assets during either of the three or nine months ended September 30, 2019.