Segment Reporting - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 956	$ 1,333	$ 1,994	$ 2,865
Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 956	$ 1,333
Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	100.00%	100.00%
Managed Services And Collaboration Products | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue			100.00%	100.00%
Managed Services
Disaggregation of Revenue [Line Items]
Revenue			$ 1,330	$ 1,776
Managed Services | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 640	$ 810
Managed Services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	67.00%	61.00%	67.00%	62.00%
Managed Services | Video collaboration services
Disaggregation of Revenue [Line Items]
Revenue			$ 110	$ 195
Managed Services | Video collaboration services | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 46	$ 79
Managed Services | Video collaboration services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	5.00%	5.00%	6.00%	7.00%
Managed Services | Network services
Disaggregation of Revenue [Line Items]
Revenue			$ 1,201	$ 1,544
Managed Services | Network services | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 583	$ 723
Managed Services | Network services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	61.00%	54.00%	60.00%	54.00%
Managed Services | Professional and other services
Disaggregation of Revenue [Line Items]
Revenue			$ 19	$ 37
Managed Services | Professional and other services | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 11	$ 8
Managed Services | Professional and other services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	1.00%	1.00%	1.00%	1.00%
Collaboration Products
Disaggregation of Revenue [Line Items]
Revenue			$ 664	$ 1,089
Collaboration Products | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 316	$ 523
Collaboration Products | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	33.00%	39.00%	33.00%	38.00%
Collaboration Products | Video collaboration services
Disaggregation of Revenue [Line Items]
Revenue			$ 664	$ 1,082
Collaboration Products | Video collaboration services | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 316	$ 520
Collaboration Products | Video collaboration services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	33.00%	39.00%	33.00%	38.00%
Collaboration Products | Professional services
Disaggregation of Revenue [Line Items]
Revenue			$ 0	$ 0
Collaboration Products | Professional services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue			0.00%	0.00%
Collaboration Products | Licensing
Disaggregation of Revenue [Line Items]
Revenue			$ 0	$ 7
Collaboration Products | Licensing | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 3
Collaboration Products | Licensing | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	0.00%	0.00%	0.00%	0.00%
Domestic
Disaggregation of Revenue [Line Items]
Revenue	$ 437	$ 705	$ 1,000	$ 1,546
Foreign
Disaggregation of Revenue [Line Items]
Revenue	$ 519	$ 628	$ 994	$ 1,319