Segment Reporting - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Disaggregation of Revenue [Line Items]
Revenue	$ 1,038	$ 1,532
Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 1,038	$ 1,532
Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	100.00%	100.00%
Managed Services | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 690	$ 966
Managed Services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	67.00%	63.00%
Managed Services | Video collaboration services | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 64	$ 116
Managed Services | Video collaboration services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	6.00%	7.00%
Managed Services | Network services | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 618	$ 821
Managed Services | Network services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	60.00%	54.00%
Managed Services | Professional and other services | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 8	$ 29
Managed Services | Professional and other services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	1.00%	2.00%
Collaboration Products | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 348	$ 566
Collaboration Products | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	33.00%	37.00%
Collaboration Products | Video collaboration services | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 348	$ 562
Collaboration Products | Video collaboration services | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	33.00%	37.00%
Collaboration Products | Licensing | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 4
Collaboration Products | Licensing | Revenue | Product Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenue	0.00%	0.00%
Domestic
Disaggregation of Revenue [Line Items]
Revenue	$ 563	$ 843
Foreign
Disaggregation of Revenue [Line Items]
Revenue	$ 475	$ 689