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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Operating Expenses:        
Product development expenses $ (367) $ (2,109) $ (600) $ (3,932)
Exploration expenses (201) (384) (409) (529)
General and administrative expenses (2,644) (2,198) (4,855) (4,282)
Arbitration costs   (13) (142) (1,545)
Depreciation and amortization (34) (1) (56) (2)
Total operating expenses (3,246) (4,705) (6,062) (10,290)
Non-Operating Income:        
Unrealized gain on equity securities   1,218   1,411
Other income 91 7 98 9
Total other income 91 1,225 98 1,420
Net Loss $ (3,155) $ (3,480) $ (5,964) $ (8,870)
BASIC AND DILUTED LOSS PER SHARE        
LOSS PER SHARE, BASIC $ (0.07) $ (0.11) $ (0.14) $ (0.29)
LOSS PER SHARE, DILUTED $ (0.07) $ (0.11) $ (0.14) $ (0.29)
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING, BASIC 47,083,720 32,431,919 41,949,062 30,525,520
WEIGHTED AVERAGE NUMBER OF SHARES OUTSTANDING, DILUTED 47,083,720 32,431,919 41,949,062 30,525,520