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Restructuring
 12 Months Ended
Dec. 31, 2018
Restructuring and Related Activities [Abstract]  
Restructuring
Restructuring 
In 2017, the Company initiated restructuring actions in order to focus on key growth initiatives and a lower break even revenue level through lower operating expenses and manufacturing costs. Actions included a reduction in force, facilities consolidation and certain asset-related adjustments. The Company recorded $0.2 million and $3.1 million in restructuring charges within cost of goods sold and operating expenses in 2018, respectively. The Company recorded $0.8 million and $3.9 million in restructuring charges within cost of goods sold and operating expenses in 2017, respectively. Additionally, the Company recorded a charge of $2.0 million to cost of goods sold in 2017 for discontinued product inventory write-downs related the Company's decisions to end-of-life certain products.
 
Employee Severance
 
Facilities Consolidation
 
Asset-Related
 
Others
 
Total
Restructuring obligations December 31, 2017
$
—

 
$
1,580

 
$
43

 
$
—

 
$
1,623

Charges
637

 
29

 
1,021

 
1,616

 
3,303

Cash payments
(196
)
 
(840
)
 
(6
)
 
(5
)
 
(1,047
)
Non-cash settlements and other
(5
)
 
—

 
(1,058
)
 
—

 
(1,063
)
Restructuring obligations December 31, 2018
$
436

 
$
769

 
$
—

 
$
1,611

 
$
2,816