Stock Based Compensation - Options Outstanding (Details) - $ / shares	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number of Options
Outstanding Number of Options, Beginning (in shares)	215,345	118,003
Outstanding Number of Options, Exchanged for Oblong Industries stock options (in shares)		107,845
Outstanding Number of Options, Expired (in shares)	(107,845)	(440)
Outstanding Number of Options, Forfeited (in shares)		(10,063)
Outstanding and Exercisable Number of Options, Ending (in shares)	107,500	215,345
Weighted Average Exercise Price
Outstanding Weighted Average Exercise Price, Beginning (in dollars per share)	$ 12.27	$ 19.90
Outstanding Weighted Average Exercise Price, Exchanged for Oblong Industries stock options (in dollars per share)		4.92
Outstanding Weighted Average Exercise Price, Expired (in dollars per share)	4.92	16.48
Outstanding Weighted Average Exercise Price, Forfeited (in dollars per share)		23.20
Outstanding and Exercisable Weighted Average Exercise Price, Ending (in dollars per share)	$ 19.64	$ 12.27
Exercisable
Exercisable Number of Options (in shares)	107,500	215,345	118,003
Exercisable Weighted Average Exercise Price (in dollars per share)	$ 19.64	$ 12.27	$ 19.90

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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