Share-Based Compensation - Additional Information (Detail) - USD ($)	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted		0
Cash from stock options exercised	$ 181,000	$ 235,000
Total intrinsic value of options exercised	13,000	36,000
Total fair value of option vested	$ 24,000	$ 231,000
Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Terms of Award	The RSUs entitle the recipient to receive one share of Class A common stock for each RSU upon vesting. The RSUs are issued with cliff vesting in five years for employees and one year for directors, provided that the recipient is still an employee or director of Gaia on such date.
Employee [Member] \| Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units vesting term	5 years
Directors [Member] \| Restricted Stock Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units vesting term	1 year
2019 Employee Stock Purchase Plan [Member] \| Class A Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock reserved and authorized for issuance		300,000
Maximum number of shares any participant may purchase per calendar year		1,000
Maximum worth of shares any participant may purchase per calendar year		$ 25,000
2009 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Plan termination date		Apr. 23, 2019
2019 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Plan termination date		Apr. 25, 2029
2019 Plan [Member] \| Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to share-based payment awards		5 years
2019 Plan [Member] \| Board Members [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation expense related to share-based payment awards		1 year
2019 Plan [Member] \| Class A Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of common stock reserved and authorized for issuance		1,800,000
2009 Plan and 2019 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized cost related to nonvested shared-based compensation	$ 7,400,000
Expected cost to be recognized over a weighted-average period	4 years 2 months 19 days

Share-based compensation arrangement by share-based payment award maximum value of shares per employee.

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- Definition

Share-based compensation arrangement by share based payment award termination date.

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- Definition

Amount of cost not yet recognized for nonvested award under share-based payment arrangement.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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- Definition

Amount of cash inflow from exercise of option under share-based payment arrangement.

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Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The highest quantity of shares an employee can purchase under the plan per period.

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- Definition

Number of shares authorized for issuance under share-based payment arrangement.

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- Definition

Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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- Definition

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

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Description of terms of award under share-based payment arrangement.

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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