Segment Reporting - Disaggregation of Revenue and Total Assets (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 1,333	$ 2,049	$ 2,865	$ 3,967
Managed Services And Collaboration Products | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	100.00%	100.00%	100.00%	100.00%
Managed Services
Disaggregation of Revenue [Line Items]
Revenue	$ 810	$ 1,078	$ 1,776	$ 2,273
Managed Services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	61.00%	53.00%	62.00%	57.00%
Managed Services | Video collaboration services
Disaggregation of Revenue [Line Items]
Revenue	$ 79	$ 230	$ 195	$ 521
Managed Services | Video collaboration services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	6.00%	11.00%	7.00%	23.00%
Managed Services | Network services
Disaggregation of Revenue [Line Items]
Revenue	$ 723	$ 830	$ 1,544	$ 1,711
Managed Services | Network services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	54.00%	41.00%	54.00%	75.00%
Managed Services | Professional and other services
Disaggregation of Revenue [Line Items]
Revenue	$ 8	$ 18	$ 37	$ 41
Managed Services | Professional and other services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	1.00%	1.00%	1.00%	2.00%
Collaboration Products
Disaggregation of Revenue [Line Items]
Revenue	$ 523	$ 971	$ 1,089	$ 1,694
Collaboration Products | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	39.00%	47.00%	38.00%	43.00%
Collaboration Products | Video collaboration services
Disaggregation of Revenue [Line Items]
Revenue	$ 520	$ 942	$ 1,082	$ 1,635
Collaboration Products | Video collaboration services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	39.00%	46.00%	38.00%	80.00%
Collaboration Products | Licensing
Disaggregation of Revenue [Line Items]
Revenue	$ 3	$ 29	$ 7	$ 59
Collaboration Products | Licensing | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	0.00%	1.00%	0.00%	3.00%
Domestic
Disaggregation of Revenue [Line Items]
Revenue	$ 705	$ 1,227	$ 1,546	$ 2,242
Foreign
Disaggregation of Revenue [Line Items]
Revenue	$ 628	$ 822	$ 1,319	$ 1,725