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Inventories Inventories (Tables)
12 Months Ended
Dec. 31, 2020
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 consists of the following (in thousands):
 At December 31,
 20202019
Raw materials$2,695 $3,937 
Finished goods5,840 5,749 
Reserve for excess, obsolete, and slow-moving inventories(2,894)(3,518)
Inventories, net$5,641 $6,168 

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

At December 31,
20202019
Beginning balance$(3,518)$(4,085)
Accrual281 (814)
Reduction due to sold inventory343 845 
Write-off for disposed inventory— 536 
Reserves for excess, obsolete, and slow-moving inventories$(2,894)$(3,518)