Segment Reporting - Disaggregation of Revenue and Total Assets (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Revenue	$ 1,185	$ 1,799	$ 4,050	$ 5,766
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	$ 797	$ 1,006	$ 2,573	$ 3,279
Managed Services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	67.00%	56.00%	64.00%	57.00%
Managed Services | Video collaboration services
Disaggregation of Revenue [Line Items]
Revenue	$ 69	$ 179	$ 264	$ 700
Managed Services | Video collaboration services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	6.00%	10.00%	7.00%	21.00%
Managed Services | Network services
Disaggregation of Revenue [Line Items]
Revenue	$ 716	$ 813	$ 2,260	$ 2,524
Managed Services | Network services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	60.00%	45.00%	56.00%	77.00%
Managed Services | Professional and other services
Disaggregation of Revenue [Line Items]
Revenue	$ 12	$ 14	$ 49	$ 55
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	$ 388	$ 793	$ 1,477	$ 2,487
Collaboration Products | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	33.00%	44.00%	36.00%	43.00%
Collaboration Products | Video collaboration services
Disaggregation of Revenue [Line Items]
Revenue	$ 385	$ 771	$ 1,467	$ 2,406
Collaboration Products | Video collaboration services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	33.00%	43.00%	36.00%	42.00%
Collaboration Products | Licensing
Disaggregation of Revenue [Line Items]
Revenue	$ 3	$ 22	$ 10	$ 81
Collaboration Products | Licensing | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	0.00%	1.00%	0.00%	1.00%
Domestic
Disaggregation of Revenue [Line Items]
Revenue	$ 575	$ 1,035	$ 2,120	$ 3,277
Foreign
Disaggregation of Revenue [Line Items]
Revenue	$ 610	$ 764	$ 1,930	$ 2,489