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ROYALTY, STREAM, AND OTHER INTERESTS - Disclosure of detailed information about transaction along with total assets acquired, net of liabilities assumed (Details) - Nova Royalty Corp [Member] $ in Thousands | 1 Months Ended |  |
--- | --- | --- | ---
Nov. 30, 2023 $ / shares | Dec. 31, 2023 Share | Dec. 01, 2023 USD ($) Share
Disclosure Of Royalty Interests And Deferred Acquisition Costs [Line Items] |  |  |
Number of Metalla Shares issued to Nova shareholders | Share |  |  | 33,893,734
Number of Metalla Shares issued to Nova RSU holders | Share |  |  | 741,597
Total Number of Metalla Shares issued | Share |  | 34,943,542 | 34,635,331
Closing price of a Metalla Share on November 30, 2023, on TSXV | $ / shares | $ 4.34 |  |
C$/US$ exchange rate on November 30, 2023 | $ / shares | $ 1.356 |  |
Value of common shares issued as consideration |  |  | $ 110,853
Value of Nova share options converted to Metalla share options |  |  | 1,152
Nova long-term debt repaid as part of transaction |  |  | 11,064
Transaction costs |  |  | 2,695
Purchase consideration |  |  | 125,764
Cash and cash equivalents |  |  | 79
Accounts receivable |  |  | 892
Mineral interests |  |  | 130,980
Current liabilities |  |  | (6,187)
Total assets acquired, net of liabilities assumed |  |  | $ 125,764

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