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Share-Based Compensation - Additional Information (Detail) - USD ($) | 12 Months Ended
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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 |

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