Note 8 - Inventories

12 Months Ended

Dec. 31, 2021

Notes to Financial Statements

Inventory Disclosure [Text Block]

8.         Inventories

The components of inventories are as follows:

	December 31, 2021
	(in thousands)
	Gross Carrying Amount		Reserve Balance			Net Carrying Amount
Finished goods	$	10,566	$	(2,987	)	$	7,579
Raw materials		10,824		(2,695	)		8,129
Total inventories	$	21,390	$	(5,682	)	$	15,708
Current Portion	$	9,931	$	(1,297	)	$	8,634
Long-term portion		11,459		(4,385	)		7,074
Total inventories	$	21,390	$	(5,682	)	$	15,708

	December 31, 2020
	(in thousands)
	Gross Carrying Amount		Reserve Balance			Net Carrying Amount
Finished goods	$	13,858	$	(3,109	)	$	10,749
Raw materials		11,163		(3,065	)		8,098
Total inventories	$	25,021	$	(6,174	)	$	18,847
Current Portion	$	11,444	$	(1,410	)	$	10,034
Long-term portion		13,577		(4,764	)		8,813
Total inventories	$	25,021	$	(6,174	)	$	18,847

The Company records an inventory reserve for estimated excess and obsolete inventory based upon historical consumption and assumptions about future demand for its products. The Company recorded a write-down of obsolete inventory for the year-ended December 31, 2019 totaling $7.4 million as part of a restructuring plan and a $1.5 million charge for inventory obsolescence related to certain system components. The decrease in the inventory reserve balance was $0.5 million and $3.0 million for the twelve months ended December 31, 2021 and 2020, respectively.