Segment Reporting - Concentration Percentage (Details)	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	100.00%	100.00%
Oblong (formerly Glowpoint) | Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	62.00%	38.00%
Oblong Industries | Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	38.00%	62.00%
Customer A | Oblong (formerly Glowpoint) | Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	36.00%	11.00%
Customer A | Oblong Industries | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	36.00%	0.00%
Customer B | Oblong (formerly Glowpoint) | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	14.00%
Customer B | Oblong Industries | Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	0.00%	22.00%
Customer C | Oblong (formerly Glowpoint) | Revenue
Concentration Risk [Line Items]
Concentration risk, percentage	10.00%
Customer C | Oblong Industries | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage	0.00%	42.00%
Customer D | Oblong Industries | Accounts Receivable
Concentration Risk [Line Items]
Concentration risk, percentage		11.00%