Note 4 - Inventories

6 Months Ended

Jun. 30, 2021

Notes to Financial Statements

Inventory Disclosure [Text Block]

4. Inventories

The components of inventories are as follows:

	June 30, 2021		December 31, 2020
	(in thousands)
Finished goods	$	13,238	$	10,749
Raw materials		5,875		8,098
Total inventories	$	19,113	$	18,847
Current portion	$	12,523	$	10,034
Long-term portion		6,590		8,813
Total inventories	$	19,113	$	18,847

During the three and six months ended June 30, 2021, the Company recorded a $0.2 million and a $0.3 million charge for inventory obsolescence related to certain system components, respectively. There were no such write-downs or charges for the three and six months ended June 30, 2020.