XML 81 R32.htm IDEA: XBRL DOCUMENT
v3.25.3

STOCKHOLDERS' EQUITY (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2025
STOCKHOLDERS' EQUITY |
Schedule of share-based compensation | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended
​ | ​ | September 30, | ​ | September 30,
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024
Stock options | ​ | $ | 2,083,722 | ​ | $ | 97,655 | ​ | $ | 2,487,805 | ​ | $ | 161,124
RSUs | ​ |  | 1,772,753 | ​ |  | 55,064 | ​ |  | 2,200,967 | ​ |  | 292,442
Total share-based compensation expense | ​ | $ | 3,856,475 | ​ | $ | 152,719 | ​ | $ | 4,688,772 | ​ | $ | 453,566
Schedule of aggregate non-cash stock-based compensation recognized | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Three Months Ended | ​ | Nine Months Ended
​ | ​ | September 30, | ​ | September 30,
​ |  | 2025 |  | 2024 |  | 2025 |  | 2024
General and administrative | ​ | $ | 145,828 | ​ | $ | 67,708 | ​ | $ | 476,921 | ​ | $ | 295,485
Salaries and benefits | ​ |  | 3,706,746 | ​ |  | 82,410 | ​ |  | 4,200,149 | ​ |  | 155,480
Professional fees | ​ |  | 3,901 | ​ |  | 2,601 | ​ |  | 11,702 | ​ |  | 2,601
Total non-cash share-based compensation expense | ​ | $ | 3,856,475 | ​ | $ | 152,719 | ​ | $ | 4,688,772 | ​ | $ | 453,566
Schedule of stock options | ​
​ | ​ | ​ | ​ | ​
​ |  | Nine Months |
​ | ​ | Ended |
​ | ​ | September |
Weighted-Average Grant Date Assumptions | ​ | 30, 2025 |
Expected term (in years) |  | ​ | 9.3 | ​
Risk-free interest rate |  | ​ | 4.3 | %
Expected dividend yield |  | ​ | 0.0 | %
Expected volatility |  | ​ | 96.0 | %
Fair value per share | ​ | $ | 2.49 | ​
​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted- | ​ | Weighted- | ​ | ​ | ​
​ | ​ | ​ | ​ | Average | ​ | Average | ​ | ​ | ​
​ | ​ | ​ | ​ | Exercise | ​ | Remaining | ​ | Aggregate
​ | ​ | ​ | ​ | Price Per | ​ | Contractual | ​ | Intrinsic
​ |  | Shares |  | Share |  | Term (in years) |  | Value
Options outstanding, December 31, 2024 |  | 4,330,000 | ​ | $ | 0.23 |  | 3.7 | ​ | $ | 6,652,700
Granted |  | 2,391,400 | ​ |  | 2.41 |  | — | ​ |  | —
Exercised |  | (672,500) | ​ |  | 0.23 |  | — | ​ |  | —
Forfeited |  | (166,667) | ​ |  | 0.22 |  | — | ​ |  | —
Expired |  | — | ​ |  | — |  | — | ​ |  | —
Options outstanding, September 30, 2025 |  | 5,882,233 | ​ | $ | 1.12 |  | 5.7 | ​ | $ | 29,818,109
Nonvested options, September 30, 2025 |  | 5,190,566 | ​ | $ | 1.21 |  | 5.8 | ​ | $ | 25,801,817
Vested and exercisable options, September 30, 2025 |  | 691,667 | ​ | $ | 0.39 |  | 4.4 | ​ | $ | 4,016,292
Schedule of restricted stock units | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted-
​ | ​ | ​ | ​ | Average
​ | ​ | ​ | ​ | Grant Date
​ | ​ | ​ | ​ | Fair Value
​ |  | Shares |  | Per Share
RSUs outstanding at December 31, 2024 |  | 2,090,000 | ​ | $ | 0.24
Granted |  | 2,182,800 | ​ |  | 2.86
Vested |  | (1,428,199) | ​ |  | 1.16
Forfeited |  | — | ​ |  | —
RSUs outstanding at September 30, 2025 |  | 2,844,601 | ​ | $ | 1.79
Schedule of common stock warrants | ​
​ | ​ | ​ | ​ | ​ | ​
​ | ​ | ​ | ​ | Weighted
​ | ​ | Number of | ​ | Average
​ |  | Warrants |  | Exercise Price
Balance at December 31, 2024 |  | 10,142,215 | ​ | $ | 0.77
Exercised |  | (5,772,822) | ​ |  | 0.77
Balance at September 30, 2025 |  | 4,369,393 | ​ | $ | 0.77
Schedule of warrants outstanding | ​
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
Number of warrants |  | Exercise Price |  | Expiration Date |  | Remaining life (years)
857,143 | ​ | $ | 0.46 |  | 1/27/2026 |  | 0.33
806,500 | ​ | $ | 0.85 |  | 2/1/2026 |  | 0.34
2,705,750 | ​ | $ | 0.85 |  | 8/3/2026 |  | 0.84
4,369,393 | ​ |  |  |  |  |  |

X
- References No definition available. + Details
Name: | uamy_ScheduleOfAggregateNonCashStockBasedCompensationRecognized
Namespace Prefix: | uamy_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | uamy_ScheduleOfCommonStockWarrantsTableTextBlock
Namespace Prefix: | uamy_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | uamy_ScheduleOfRestrictedStockUnitsTableTextBlock
Namespace Prefix: | uamy_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the change in common stock outstanding. + References No definition available. + Details
Name: | us-gaap_ScheduleOfCommonStockOutstandingRollForwardTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the change in stock options. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfStockOptionsRollForwardTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StockholdersEquityAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration