Segment Reporting - Disaggregation of Revenue and Total Assets (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 1,532	$ 1,918
Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	100.00%	100.00%
Managed Services
Disaggregation of Revenue [Line Items]
Revenue	$ 966	$ 1,195
Managed Services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	63.00%	62.00%
Managed Services | Video collaboration services
Disaggregation of Revenue [Line Items]
Revenue	$ 116	$ 291
Managed Services | Video collaboration services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	7.00%	15.00%
Managed Services | Network services
Disaggregation of Revenue [Line Items]
Revenue	$ 821	$ 881
Managed Services | Network services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	54.00%	46.00%
Managed Services | Professional and other services
Disaggregation of Revenue [Line Items]
Revenue	$ 29	$ 23
Managed Services | Professional and other services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	2.00%	1.00%
Collaboration Products
Disaggregation of Revenue [Line Items]
Revenue	$ 566	$ 723
Collaboration Products | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	37.00%	38.00%
Collaboration Products | Video collaboration services
Disaggregation of Revenue [Line Items]
Revenue	$ 562	$ 693
Collaboration Products | Video collaboration services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	37.00%	36.00%
Collaboration Products | Licensing
Disaggregation of Revenue [Line Items]
Revenue	$ 4	$ 30
Collaboration Products | Licensing | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	0.00%	2.00%
Domestic
Disaggregation of Revenue [Line Items]
Revenue	$ 843	$ 1,015
Foreign
Disaggregation of Revenue [Line Items]
Revenue	$ 689	$ 903