Segment Reporting - Disaggregation of Revenue and Total Assets (Details) $ in Thousands	3 Months Ended
Mar. 31, 2021 USD ($)	Mar. 31, 2020 USD ($)
Disaggregation of Revenue [Line Items]
Foreign revenue	0.01	0.01
Revenue	$ 1,918	$ 5,328
Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	100.00%	100.00%
Oblong (formerly Glowpoint)
Disaggregation of Revenue [Line Items]
Revenue	$ 1,195	$ 2,045
Oblong (formerly Glowpoint) \| Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	62.00%	38.00%
Oblong (formerly Glowpoint) \| Video collaboration services
Disaggregation of Revenue [Line Items]
Revenue	$ 291	$ 1,046
Oblong (formerly Glowpoint) \| Video collaboration services \| Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	15.00%	20.00%
Oblong (formerly Glowpoint) \| Network services
Disaggregation of Revenue [Line Items]
Revenue	$ 881	$ 925
Oblong (formerly Glowpoint) \| Network services \| Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	46.00%	17.00%
Oblong (formerly Glowpoint) \| Professional and other services
Disaggregation of Revenue [Line Items]
Revenue	$ 23	$ 74
Oblong (formerly Glowpoint) \| Professional and other services \| Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	1.00%	1.00%
Oblong Industries
Disaggregation of Revenue [Line Items]
Revenue	$ 723	$ 3,283
Oblong Industries \| Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	38.00%	62.00%
Oblong Industries \| Video collaboration services
Disaggregation of Revenue [Line Items]
Revenue	$ 693	$ 2,322
Oblong Industries \| Video collaboration services \| Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	36.00%	44.00%
Oblong Industries \| Professional and other services
Disaggregation of Revenue [Line Items]
Revenue	$ 0	$ 669
Oblong Industries \| Professional and other services \| Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	0.00%	13.00%
Oblong Industries \| Licensing
Disaggregation of Revenue [Line Items]
Revenue	$ 30	$ 292
Oblong Industries \| Licensing \| Revenue
Disaggregation of Revenue [Line Items]
Percentage of revenue	2.00%	5.00%
Domestic
Disaggregation of Revenue [Line Items]
Revenue	$ 1,015	$ 3,602
Foreign
Disaggregation of Revenue [Line Items]
Revenue	$ 903	$ 1,726

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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