Annual report pursuant to Section 13 and 15(d)

Royalty Interests (Details)

v3.20.4
Royalty Interests (Details)
$ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
a
Dec. 31, 2019
USD ($)
a
Net Book Value    
Royalty interest acquired $ 46,266 $ 29,320
Total royalty interests, gross 46,266 29,320
Less: accumulated depletion (620) (260)
Total royalty interests, net 45,646 29,060
1/16th nonparticipating perpetual royalty interest    
Net Book Value    
1/16th nonparticipating perpetual royalty interest $ 0 $ 0
Nonparticipating perpetual royalty interest rate (in percentage) 6.25% 6.25%
Gross royalty interests (in acres) | a 370,737 370,737
1/128th nonparticipating perpetual royalty interest    
Net Book Value    
1/128th nonparticipating perpetual royalty interest $ 0 $ 0
Nonparticipating perpetual royalty interest rate (in percentage) 0.78125% 0.78125%
Gross royalty interests (in acres) | a 84,934 84,934
Royalty interests in acres    
Net Book Value    
Net royalty interest acquired (in acres) | a 4,090 3,074