Segment Reporting - Disaggregation of Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Disaggregation of Revenue [Line Items]
Total revenue	$ 12,827	$ 12,557
Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	100.00%	100.00%
Glowpoint
Disaggregation of Revenue [Line Items]
Total revenue	$ 9,660	$ 12,557
Glowpoint | Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	75.00%	100.00%
Glowpoint | Assets
Disaggregation of Revenue [Line Items]
Percentage of revenue	100.00%	100.00%
Glowpoint | Video collaboration services
Disaggregation of Revenue [Line Items]
Total revenue	$ 5,566	$ 7,589
Glowpoint | Video collaboration services | Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	43.00%	60.00%
Glowpoint | Network services
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,860	$ 4,351
Glowpoint | Network services | Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	30.00%	35.00%
Glowpoint | Professional and other services
Disaggregation of Revenue [Line Items]
Total revenue	$ 234	$ 617
Glowpoint | Professional and other services | Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	2.00%	5.00%
Oblong Industries
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,167	$ 0
Oblong Industries | Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	25.00%	0.00%
Oblong Industries | Video collaboration services
Disaggregation of Revenue [Line Items]
Total revenue	$ 2,180	$ 0
Oblong Industries | Video collaboration services | Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	17.00%
Oblong Industries | Professional and other services
Disaggregation of Revenue [Line Items]
Total revenue	$ 709	$ 0
Oblong Industries | Professional and other services | Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	6.00%	0.00%
Oblong Industries | Licensing
Disaggregation of Revenue [Line Items]
Total revenue	$ 278	$ 0
Oblong Industries | Licensing | Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	2.00%	0.00%
Foreign
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,731	$ 4,134
Foreign | Oblong Industries | Assets
Disaggregation of Revenue [Line Items]
Percentage of revenue	17.00%
Domestic
Disaggregation of Revenue [Line Items]
Total revenue	$ 9,096	$ 8,423
Domestic | Oblong Industries | Assets
Disaggregation of Revenue [Line Items]
Percentage of revenue	83.00%