Segment Reporting (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) segment	Mar. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment	2
Revenue	$ 1,918	$ 5,328
Cost of revenues	1,290	2,374
Gross profit	$ 628	$ 2,954
Gross profit %	33.00%	55.00%
Total operating expenses	$ 4,039	$ 5,931
Loss from operations	(3,411)	(2,977)
Interest and other expense, net	22	152
Loss before income taxes	(3,433)	(3,129)
Income tax expense	0	0
Net loss	(3,433)	(3,129)
Allocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	1,941	3,363
Unallocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	2,098	2,568
Oblong (formerly Glowpoint)
Segment Reporting Information [Line Items]
Revenue	1,195	2,045
Cost of revenues	833	1,156
Gross profit	$ 362	$ 889
Gross profit %	30.00%	43.00%
Total operating expenses	$ 110	$ 1,290
Loss from operations	252	(401)
Interest and other expense, net	5	0
Loss before income taxes	247	(401)
Income tax expense	0	0
Net loss	247	(401)
Oblong (formerly Glowpoint) | Allocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	110	1,290
Oblong (formerly Glowpoint) | Unallocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	0	0
Oblong Industries
Segment Reporting Information [Line Items]
Revenue	723	3,283
Cost of revenues	457	1,218
Gross profit	$ 266	$ 2,065
Gross profit %	37.00%	63.00%
Total operating expenses	$ 1,831	$ 2,073
Loss from operations	(1,565)	(8)
Interest and other expense, net	17	0
Loss before income taxes	(1,582)	(8)
Income tax expense	0	0
Net loss	(1,582)	(8)
Oblong Industries | Allocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	1,831	2,073
Oblong Industries | Unallocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	0	0
Corporate
Segment Reporting Information [Line Items]
Revenue	0	0
Cost of revenues	0	0
Gross profit	0	0
Total operating expenses	2,098	2,568
Loss from operations	(2,098)	(2,568)
Interest and other expense, net	0	152
Loss before income taxes	(2,098)	(2,720)
Income tax expense	0	0
Net loss	(2,098)	(2,720)
Corporate | Allocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	0	0
Corporate | Unallocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	$ 2,098	$ 2,568