Oil and Gas Royalty Interests (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Oil and gas royalty interests:
Royalty interests acquired, at cost	$ 51,494	$ 47,928
Total royalty interests	51,494	47,928
Less: accumulated depletion	(4,281)	(2,903)
Royalty interests, net	47,213	45,025
1/16th nonparticipating perpetual royalty interest
Oil and gas royalty interests:
1/16th nonparticipating perpetual royalty interest	0	0
1/128th nonparticipating perpetual royalty interest
Oil and gas royalty interests:
1/128th nonparticipating perpetual royalty interest	$ 0	$ 0