XML 27 R15.htm IDEA: XBRL DOCUMENT
v3.25.2

Goodwill and Intangible Assets | 6 Months Ended
--- | ---
Jun. 30, 2025
Goodwill and Intangible Assets |
Goodwill and Intangible Assets | Note 8. Goodwill and Intangible Assets Goodwill The goodwill balance of $122.5 million and $121.9 million as of June 30, 2025 and December 31, 2024, respectively, was attributable to the assembled workforces of experienced personnel at Block Mining and E4A Solutions and synergies expected to be achieved as a result of the Company’s acquisitions. See Note 3. Acquisitions. Finite-lived intangible assets The following table presents the Company’s finite-lived intangible assets as of June 30, 2025:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted-
​ | ​ | Gross | ​ | Accumulated | ​ | Net book | ​ | average life
​ |  | book value |  | amortization |  | value |  | (years)
Customer contracts | ​ | $ | 29,400 | ​ | $ | (3,473) | ​ | $ | 25,927 |  | 10
Trademark | ​ |  | 6,100 | ​ |  | (1,851) | ​ |  | 4,249 |  | 10
UL Listings | ​ |  | 2,700 | ​ |  | (806) | ​ |  | 1,894 |  | 12
Patents | ​ | ​ | 10,060 | ​ | ​ | (10,060) | ​ | ​ | — | ​ | Various
Finite-lived intangible assets | ​ | $ | 48,260 | ​ | $ | (16,190) | ​ | $ | 32,070 | ​ | ​
​ The following table presents the Company’s finite-lived intangible assets as of December 31, 2024:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ |  | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted-
​ | ​ | Gross |  | Accumulated |  | Net book | ​ | average life
​ |  | book value |  | amortization |  | value |  | (years)
Customer contracts | ​ | $ | 29,400 | ​ | $ | (1,911) | ​ | $ | 27,489 |  | 10
Trademark | ​ |  | 6,100 | ​ |  | (1,542) | ​ |  | 4,558 |  | 10
UL Listings | ​ |  | 2,700 | ​ |  | (694) | ​ |  | 2,006 |  | 12
Patents | ​ | ​ | 10,060 | ​ | ​ | (10,060) | ​ | ​ | — | ​ | Various
Finite-lived intangible assets | ​ | $ | 48,260 | ​ | $ | (14,207) | ​ | $ | 34,053 | ​ | ​
​ For the three months ended June 30, 2025 and 2024, amortization expense related to finite-lived intangible assets was $1.0 million and $1.4 million, respectively, and $2.0 million and $2.9 million, respectively, for the six months ended June 30, 2025 and 2024. The following table presents the estimated future amortization of the Company’s finite-lived intangible assets as of June 30, 2025:
​ | ​ | ​ | ​
Remainder of 2025 | ​ | $ | 1,888
2026 | ​ |  | 3,775
2027 | ​ |  | 3,775
2028 | ​ |  | 3,775
2029 | ​ |  | 3,775
Thereafter | ​ |  | 15,082
Total | ​ | $ | 32,070
​ The Company did not identify any impairment of its finite-lived intangible assets during the three and six months ended June 30, 2025 and 2024.

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

X
- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/350-30/tableOfContent Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482665/350-30-50-3 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481283/985-20-50-2 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 985 -SubTopic 20 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/985-20/tableOfContent + Details
Name: | us-gaap_IntangibleAssetsDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration