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Inventories
12 Months Ended
Dec. 31, 2018
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories are as follows (in thousands):
 
December 31,
 
2018
 
2017
Raw materials
$
10,608

 
$
13,462

Work-in-process

 
3

Finished goods
18,798

 
19,363

Inventories
29,406

 
32,828

Less reserve for excess and obsolete inventory
(2,117
)
 
(368
)
Inventories, net
$
27,289

 
$
32,460


Changes in the reserve for excess and obsolete inventory are as follows (in thousands):
 
2018
 
2017
 
2016
Balance, beginning of year
$
368

 
$
50

 
$
50

Charged to costs and expenses
2,418

 
388

 

Deductions
(669
)
 
(70
)
 

Balance, end of the year
$
2,117

 
$
368

 
$
50