A-Mark Precious Metals, Inc. Annual report [Section 13 and 15(d), not S-K Item 405]

Annual report [Section 13 and 15(d), not S-K Item 405]

Description of Business - Additional Information (Details)

Description of Business - Additional Information (Details)						1 Months Ended				3 Months Ended		12 Months Ended
	Apr. 01, 2025 USD ($)	Feb. 28, 2025 USD ($)	Jan. 31, 2025 USD ($)	Jun. 21, 2024 USD ($)	Feb. 26, 2024 USD ($)	Feb. 28, 2025 USD ($) shares	Sep. 30, 2024 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2022	Jun. 30, 2025 USD ($)	Jun. 30, 2024 USD ($)	Jun. 30, 2025 USD ($) Product Reportable_segments Coin shares	Jun. 30, 2024 USD ($)	Jun. 30, 2023 USD ($)	Feb. 29, 2024	Dec. 31, 2021	Dec. 31, 2019	Aug. 31, 2017 USD ($)
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