Note 4 - Inventories

12 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Inventory Disclosure [Text Block]

( 4 ) Inventories

Inventories are stated at the lower of cost or net realizable value using the average cost method. Inventories consist of the following (in thousands):

	December 31,
	2020		2019
Raw materials	$	—	$	—
Work in process		—		—
Finished goods		—		4
Total	$	—	$	4

Write downs for excess or expired inventory are based on management's estimates of forecasted usage of inventories and are included in cost of goods sold. A significant change in the timing or level of demand for certain products as compared to forecasted amounts

may

result in recording additional write downs for excess or expired inventory in the future. Charges to cost of goods sold for inventory write-downs, reserve adjustments, scrap, shrinkage and expired inventories totaled approximately

$2,000

and

$36,000

for the years ended

December 31, 2020,

and

2019,

respectively.