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