Annual report pursuant to Section 13 and 15(d)

Accrued Liabilities - Schedule of Warranty Costs (Details)

v3.20.4
Accrued Liabilities - Schedule of Warranty Costs (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2020
Dec. 31, 2019
Accrued Liabilities, Rollforward [Roll Forward]        
Standard Product Warranty Description Sales of devices generally include an initial warranty for parts and services for one year in the Americas, two years in Europe, the Middle East, Africa, and one or two years in the Asia Pacific region.      
Warranty        
Accrued Liabilities, Rollforward [Roll Forward]        
Balance at beginning of the period $ 350 $ 319    
Additions for estimated future expense 219 416    
Incurred costs (343) (385)    
Balance at end of the period 226 350    
Current portion     $ 188 $ 285
Long-term portion     38 65
Total $ 350 $ 350 $ 226 $ 350