Annual report pursuant to Section 13 and 15(d)

Share-Based Compensation - Additional Information (Detail)

v3.10.0.1
Share-Based Compensation - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Rate at which options vest per month 2.00%  
Period over which options vest and become exercisable 50 months  
Cash from stock options exercised $ 0.3 $ 0.1
Total intrinsic value of options exercised 0.4 0.1
Total fair value of option vested $ 0.3 $ 0.3
2009 Long-Term Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Plan termination date Apr. 23, 2019  
Unrecognized cost related to nonvested shared-based compensation $ 7.8  
Expected cost to be recognized over a weighted-average period 4 years 18 days  
2009 Long-Term Incentive Plan [Member] | Restricted Stock Units (RSUs) [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 vest with cliff vesting in 5 years, provided that the recipient is still an employee or director of Gaia on such date.  
Restricted stock units vesting term 5 years  
2009 Long-Term Incentive Plan [Member] | Class A Common Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares that may be issued 3,000,000  
Employee [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation expense related to share-based payment awards 5 years  
Board Members [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Compensation expense related to share-based payment awards 5 years