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Business Description, Basis of Presentation and Significant Accounting Policies - Revenue by Product Group (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Revenue
Revenue	$ 29,069	$ 25,042
North and South America
Revenue
Revenue	18,320	14,040
Asia (including Middle East) and Australia
Revenue
Revenue	5,998	7,773
Europe and Africa
Revenue
Revenue	4,751	3,229
Audio Conferencing
Revenue
Revenue	10,926	11,609
Microphones
Revenue
Revenue	9,149	8,818
Video products
Revenue
Revenue	$ 8,994	$ 4,615

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