Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Goodwill - Narrative (Details)		12 Months Ended
Goodwill - Narrative (Details)	Mar. 31, 2020 USD ($)	Dec. 31, 2020 USD ($) reporting_unit	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Goodwill [Line Items]
Goodwill		$ 7,367,000	$ 7,908,000	$ 2,795,000
Acquisition			7,367,000
Number of reporting units \| reporting_unit		2
Impairment charges on goodwill		$ 541,000	2,254,000
Oblong Industries
Goodwill [Line Items]
Goodwill		7,367,000	7,367,000	0
Acquisition			7,367,000
Impairment charges on goodwill		0	0
Oblong (formerly Glowpoint)
Goodwill [Line Items]
Goodwill		0	541,000	$ 2,795,000
Acquisition			0
Impairment charges on goodwill	$ 541,000	$ 541,000	$ 2,254,000