Leases - Schedule of Right of Use Asset and Related Lease Liability (Detail) $ in Thousands	Sep. 30, 2020 USD ($)
Leases [Abstract]
Right-of-use asset	$ 8,806
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	gaia:BuildingAndLandNet
Operating lease liability (current)	$ 685
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Operating lease liability (non-current)	$ 8,127
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	gaia:LongTermDebtAndOtherLiabilitiesNet
Operating Lease, Liability	$ 8,812