Inventories (Tables)

9 Months Ended

Sep. 30, 2021

Inventory Disclosure [Abstract]

Schedule of inventory

Inventories are stated at the lower of standard cost (which approximates actual cost determined using the first-in, first-out cost method) or net realizable value, and consist of the following (in thousands):

	September 30, 2021		December 31, 2020
Raw materials	$	4,232	$	2,695
Finished goods	6,409		5,840
Reserves for excess, obsolete, and slow-moving inventories	(2,886)		(2,894)
Inventories, net	$	7,755	$	5,641

The following is a roll-forward of the reserves for excess, obsolete, and slow-moving inventories (in thousands):

	Three months ended September 30,				Nine months ended September 30,
	2021		2020		2021		2020
Beginning balance	$	(2,956)	$	(3,326)	$	(2,894)	$	(3,645)
Accrual	34		(187)		(64)		(75)
Reduction due to sold inventory	36		121		72		288
Write-off for disposed inventory	—		(23)		—		17
Reserves for excess, obsolete, and slow-moving inventories	$	(2,886)	$	(3,415)	$	(2,886)	$	(3,415)