Note 4 - Inventories

3 Months Ended

Mar. 31, 2021

Notes to Financial Statements

Inventory Disclosure [Text Block]

4. Inventories

The components of inventories are as follows:

	March 31, 2021		December 31, 2020
	(in thousands)
Finished goods	$	11,841	$	10,749
Raw materials		6,996		8,098
Total inventories	$	18,837	$	18,847
Current portion	$	11,181	$	10,034
Long-term portion		7,656		8,813
Total inventories	$	18,837	$	18,847

During the three months ended March 31, 2021, the Company recorded a $0.1 million charge for inventory obsolescence related to certain system components. There were no such write-downs or charges for the three months ended March 31, 2020.