v3.25.2
Description of Business - Additional Information (Details)
 1 Months Ended 3 Months Ended 12 Months Ended
Apr. 01, 2025
USD ($)
Feb. 28, 2025
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Jan. 31, 2025
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Jun. 21, 2024
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Feb. 26, 2024
USD ($)
Feb. 28, 2025
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shares
Sep. 30, 2024
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Jun. 30, 2024
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Jun. 30, 2022
Jun. 30, 2025
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Jun. 30, 2024
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Jun. 30, 2025
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Product
Reportable_segments
Coin
shares
Jun. 30, 2024
USD ($)
Jun. 30, 2023
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Feb. 29, 2024
Dec. 31, 2021
Dec. 31, 2019
Aug. 31, 2017
USD ($)
Description Of Business [Line Items]                                    
Number of reportable segments | Reportable_segments                       3            
Dividend paid                       $ 18,804,000 $ 41,845,000 $ 37,468,000        
Goodwill               $ 199,937,000   $ 228,650,000 $ 199,937,000 228,650,000 199,937,000 100,943,000        
Noncontrolling ownership interest acquisition                       408,000            
Remeasurement (loss) gain on pre-existing equity interests                       (5,143,000) 16,669,000 0        
Derecognition of accumulated other comprehensive income related to the currency translation adjustment                       $ 151,000 1,086,000 $ (1,025,000)        
Common Stock                                    
Description Of Business [Line Items]                                    
Shares issued for acquisition | shares                       423,234            
LPM Group Limited                                    
Description Of Business [Line Items]                                    
Business acquisition, percentage of interests acquired         100.00%                          
Business acquisition, upfront consideration         $ 41,400,000                          
Common stock         3,514,000                          
Cash consideration         $ 37,506,000                          
Lock-up Period         270 days                          
Contingent Consideration (EBITDA)   $ 37,500,000     $ 37,500,000 $ 37,500,000                        
Settlement of pre-existing liabilities due to A-Mark         400,000                          
Consideration to acquire         44,218,000                          
Business acquisition, consideration in shares | shares           139,455                        
Settlement of pre-existing payables due to A-Mark         398,000                          
Business acquisition, transaction costs         2,800,000                          
Contingent consideration   $ 2,800,000     2,800,000 $ 2,800,000   2,400,000   1,200,000 2,400,000 $ 1,200,000 $ 2,400,000          
Goodwill         21,034,000                          
Increase (decrease) in goodwill during the period                     1,000,000              
Change in working capital balances                     $ 1,000,000              
Fair value, classified as short-term under accrued liabilities         $ 526,000         500,000   500,000            
LPM Group Limited | Customer Relationships                                    
Description Of Business [Line Items]                                    
Weighted average useful life         7 years 2 months 12 days                          
LPM Group Limited | Accrued Liabilities, Current                                    
Description Of Business [Line Items]                                    
Contingent consideration                   500,000   500,000            
Silver Gold Bull, Inc.                                    
Description Of Business [Line Items]                                    
Cash consideration       $ 9,600,000       $ 9,600,000                    
Business acquisition, option to purchase additional percentage of the outstanding equity               8.00% 27.60%   8.00%   8.00%          
Dividends declared               $ 15,900,000                    
Ownership interest percentage after transaction               55.40% 47.40%                  
Consideration to acquire       128,818,000                            
Settlement of pre-existing payables due to A-Mark       9,418,000                            
Business acquisition, transaction costs       200,000                            
Goodwill       77,960,000       $ 78,000,000     $ 78,000,000   $ 78,000,000          
Fair value, classified as short-term under accrued liabilities       7,205,000                            
Remeasurement (loss) gain on pre-existing equity interests       16,700,000                            
Derecognition of accumulated other comprehensive income related to the currency translation adjustment       $ 1,300,000                            
Percentage of fair value of pre-existing ownership interest       47.40%                            
Pre-existing ownership interest       $ 56,848,000                            
Fair value of noncontrolling ownership interest       $ 50,652,000                            
Silver Gold Bull, Inc. | Customer Relationships                                    
Description Of Business [Line Items]                                    
Weighted average useful life       4 years                            
Silver Gold Bull, Inc. | SGB Shareholders                                    
Description Of Business [Line Items]                                    
Dividend paid             $ 7,500,000                      
Dividends receivable               7,500,000     7,500,000   7,500,000          
Dividend payable               8,400,000   0 8,400,000 $ 0 8,400,000          
Silver Gold Bull, Inc. | Other shareholders [Member]                                    
Description Of Business [Line Items]                                    
Dividend payable               $ 8,400,000     $ 8,400,000   $ 8,400,000          
JMB                                    
Description Of Business [Line Items]                                    
Number of products | Product                       7,000            
Goldline, LLC                                    
Description Of Business [Line Items]                                    
Goodwill                                   $ 1,400,000
SGI                                    
Description Of Business [Line Items]                                    
Business acquisition, percentage of interests acquired   100.00%       100.00%                        
Common stock           $ 43,618,000                        
Cash consideration           46,000,000                        
Consideration to acquire           103,280,000                        
Transaction bonuses   $ 1,300,000                                
Repayment of debt obligations           11,017,000                        
Settlement of pre-existing payables due to A-Mark           $ 419,000                        
Shares issued for acquisition | shares           1,181,548                        
Business acquisition, transaction costs   1,700,000       $ 1,700,000                        
Hold-back consideration - common stock           1,818,000                        
Goodwill   13,838,000       13,838,000                        
Increase (decrease) in goodwill during the period                   (600,000)                
Fair value, classified as short-term under accrued liabilities   $ 9,789,000       9,789,000                        
Noncontrolling ownership interest acquisition           $ 408,000           $ 408,000            
SGI | Indemnification Obligations                                    
Description Of Business [Line Items]                                    
Business acquisition, consideration in shares | shares           66,872                        
Hold-back consideration - common stock           $ 1,800,000                        
Accrued liabilities and other liabilities                   1,500,000   1,500,000            
SGI | Common Stock                                    
Description Of Business [Line Items]                                    
Business acquisition, consideration in shares | shares           1,671,654                        
SGI | Customer Relationships                                    
Description Of Business [Line Items]                                    
Weighted average useful life           5 years                        
SGI | Developed Technology                                    
Description Of Business [Line Items]                                    
Weighted average useful life           4 years                        
Pinehurst Coin Exchange, Inc.                                    
Description Of Business [Line Items]                                    
Ownership percentage acquired   51.00%       51.00%                     10.00%  
Ownership percentage after incremental investment     49.00%                         49.00%    
Cash consideration           $ 6,500,000                        
Fair value of ownership interest held     $ 6,900,000     6,933,000                        
Consideration to acquire           26,711,000                        
Repayment of debt obligations           16,903,000                        
Settlement of pre-existing receivables due from A-Mark           4,325,000                        
Business acquisition, transaction costs   $ 200,000       200,000                        
Contingent consideration   700,000       700,000       800,000   800,000            
Goodwill   2,753,000       2,753,000                        
Increase (decrease) in goodwill during the period                   300,000                
Increase in net deferred tax                   300,000                
Contingent consideration required to pay upon certain achievement   5,300,000       5,300,000                        
Fair value, classified as short-term under accrued liabilities   $ 2,380,000       2,380,000                        
Remeasurement loss on pre-existing equity interest           7,000,000                        
Pinehurst Coin Exchange, Inc. | Promissory Notes                                    
Description Of Business [Line Items]                                    
Notes issued for business combination           $ 3,100,000                        
Pinehurst Coin Exchange, Inc. | Customer Relationships                                    
Description Of Business [Line Items]                                    
Weighted average useful life           4 years                        
AMS Holding, LLC                                    
Description Of Business [Line Items]                                    
Business acquisition, percentage of interests acquired 90.00%                                  
Ownership percentage acquired 10.00%                                  
Cash consideration $ 50,958,000                                  
Fair value of ownership interest held 6,318,000                                  
Settlement of pre-existing liabilities due to A-Mark 13,911,000                                  
Consideration to acquire 77,087,000                                  
Business acquisition, transaction costs 2,400,000                                  
Contingent consideration 5,900,000                 5,900,000   5,900,000            
Goodwill 12,122,000                                  
Fair value, classified as short-term under accrued liabilities 3,962,000                                  
Remeasurement (loss) gain on pre-existing equity interests 1,900,000                                  
Goodwill expected to be deductible for tax purposes 4,300,000                                  
AMS Holding, LLC | Upon Achievement of Financial Targets when Certain Inventory is Sold                                    
Description Of Business [Line Items]                                    
Additional contingent consideration to be paid $ 3,000,000                                  
AMS Holding, LLC | Customer Relationships                                    
Description Of Business [Line Items]                                    
Weighted average useful life 5 years                                  
AMS Holding, LLC | Accrued Liabilities, Current                                    
Description Of Business [Line Items]                                    
Contingent consideration                   $ 3,200,000   $ 3,200,000            
Maximum | Silver Gold Bull, Inc.                                    
Description Of Business [Line Items]                                    
Business acquisition, percentage of interests acquired               70.00% 75.00%   70.00%   70.00%          
Maximum | AMS Holding, LLC | Upon Achievement of Certain Performance Benchmarks                                    
Description Of Business [Line Items]                                    
Additional contingent consideration to be paid $ 9,000,000                                  
Minimum                                    
Description Of Business [Line Items]                                    
Number of coins and bar products | Coin                       2,000            
Precious Metals Purchasing Partners, LLC | Silver Gold Bull, Inc.                                    
Description Of Business [Line Items]                                    
Percentage of ownership percentage                       50.00%            
Precious Metals Purchasing Partners, LLC | Goldline, LLC                                    
Description Of Business [Line Items]                                    
Percentage of ownership percentage                       50.00%            
Collectible Card Partners, LLC                                    
Description Of Business [Line Items]                                    
Percentage of ownership percentage                       50.00%            
Aquila Holding LLC | AM/LPM Ventures, LLC [Member]                                    
Description Of Business [Line Items]                                    
Percentage of Purchase Interest         5.00%                   5.00%      
Consideration received on equity interest purchased         $ 2,100,000