Segment Reporting (Details) $ in Thousands	3 Months Ended				6 Months Ended
	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Jun. 30, 2021 USD ($) segment	Jun. 30, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of operating segments | segment					2
Revenue	$ 2,049		$ 2,816		$ 3,967	$ 8,144
Cost of revenues	1,249		1,683		2,539	4,072
Gross profit	$ 800		$ 1,133		$ 1,428	$ 4,072
Gross profit %	39.00%		40.00%		36.00%	50.00%
Total operating expenses	$ 3,278		$ 4,433		$ 7,317	$ 10,359
Loss from operations	(2,478)		(3,300)		(5,889)	(6,287)
Interest and other expense (income), net	(232)		85		(210)	227
Loss before income taxes	(2,246)		(3,385)		(5,679)	(6,514)
Income tax expense	0		0		0	0
Net loss	(2,246)	$ (3,433)	(3,385)	$ (3,129)	(5,679)	(6,514)
Allocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	1,878		3,637		3,819	8,197
Unallocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	1,400		796		3,498	2,162
Oblong (formerly Glowpoint)
Segment Reporting Information [Line Items]
Revenue	1,078		1,373		2,273	3,417
Cost of revenues	739		898		1,572	2,055
Gross profit	$ 339		$ 475		$ 701	$ 1,362
Gross profit %	31.00%		35.00%		31.00%	40.00%
Total operating expenses	$ 82		$ 1,063		$ 193	$ 2,212
Loss from operations	257		(588)		508	(850)
Interest and other expense (income), net	9		7		14	7
Loss before income taxes	248		(595)		494	(857)
Income tax expense	0		0		0	0
Net loss	248		(595)		494	(857)
Oblong (formerly Glowpoint) | Allocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	82		1,063		193	2,212
Oblong (formerly Glowpoint) | Unallocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	0		0			0
Oblong Industries
Segment Reporting Information [Line Items]
Revenue	971		1,443		1,694	4,727
Cost of revenues	510		785		967	2,017
Gross profit	$ 461		$ 658		$ 727	$ 2,710
Gross profit %	47.00%		46.00%		43.00%	57.00%
Total operating expenses	$ 1,796		$ 2,574		$ 3,626	$ 5,985
Loss from operations	(1,335)		(1,916)		(2,899)	(3,275)
Interest and other expense (income), net	(241)		78		(224)	220
Loss before income taxes	(1,094)		(1,994)		(2,675)	(3,495)
Income tax expense	0		0		0	0
Net loss	(1,094)		(1,994)		(2,675)	(3,495)
Oblong Industries | Allocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	1,796		2,574		3,626	5,985
Oblong Industries | Unallocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	0		0			0
Corporate
Segment Reporting Information [Line Items]
Revenue	0		0		0	0
Cost of revenues	0		0		0	0
Gross profit	0		0		0	0
Total operating expenses	1,400		796		3,498	2,162
Loss from operations	(1,400)		(796)		(3,498)	(2,162)
Interest and other expense (income), net	0		0		0	0
Loss before income taxes	(1,400)		(796)		(3,498)	(2,162)
Income tax expense	0		0		0	0
Net loss	(1,400)		(796)		(3,498)	(2,162)
Corporate | Allocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	0		0		0	0
Corporate | Unallocated operating expenses
Segment Reporting Information [Line Items]
Total operating expenses	$ 1,400		$ 796		$ 3,498	$ 2,162