Note 5 - Inventories

9 Months Ended

Sep. 30, 2021

Notes to Financial Statements

Inventory Disclosure [Text Block]

5. Inventories

The components of inventories are as follows:

	September 30, 2021		December 31, 2020
	(in thousands)
Finished goods	$	11,154	$	10,749
Raw materials		6,763		8,098
Total inventories	$	17,917	$	18,847
Current portion	$	11,954	$	10,034
Long-term portion		5,963		8,813
Total inventories	$	17,917	$	18,847

During the three and nine months ended September 30, 2021, the Company recorded a $0.1 million and a $0.4 million charge for inventory obsolescence related to certain system components, respectively. There were no such write-downs or charges for the three and nine months ended September 30, 2020.