The amount of increase in noncontrolling interests due to transfer of subsidiary with noncontrolling interests.

No definition available.

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- Definition

The amount of increase in redeemable noncontrolling interests due to transfer of subsidiary with noncontrolling interests.

+ References

No definition available.

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- Definition

The amount of joint venture investment funds collected.

+ References

No definition available.

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- Definition

Represents the number of minority investment entities that are not consolidated and are accounted for under the equity method.

+ References

No definition available.

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- Definition

The percentage of equity issued on conversion of noncontrolling interests.

+ References

No definition available.

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- Definition

The percentage of equity purchased by employees, key managers and Contributors.

+ References

No definition available.

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- Definition

The total investment value of a joint venture agreement.

+ References

No definition available.

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- Definition

Represents a sale (new stock issuance) by a subsidiary to noncontrolling interests (third parties, parties directly or indirectly unrelated to parent) during the period. The capital transaction by subsidiary does not result in a loss of control by the parent, but does effect a change in total (consolidated) equity attributable to the parent.

+ References

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

Amount of consideration received or receivable for the disposal of assets and liabilities, including discontinued operation.

+ References

No definition available.

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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 10
-Section 50
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- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-SubTopic 10
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

Cost of the investment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 210
-Section 50
-Paragraph 6
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841

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- Definition

The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity.

+ References

No definition available.

+ Details

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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

+ Details

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- Definition

The cash outflow associated with the investment in or advances to an entity in which the reporting entity shares control of the entity with another party or group.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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Basis of Presentation (Details)		1 Months Ended			9 Months Ended	12 Months Ended
Basis of Presentation (Details)	Jan. 25, 2021 USD ($)	May 31, 2021 USD ($)	Feb. 28, 2021 USD ($)	Jan. 31, 2021 USD ($)	Sep. 30, 2021 USD ($) company	Dec. 31, 2020 USD ($) company	Jun. 30, 2021 USD ($)	Dec. 31, 2019	May 31, 2019	Apr. 30, 2019
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Number of equity method investments \| company					5	5
Investments, equity method					$ 9,340,000	$ 6,376,000
Transaction results in increase to redeemable noncontrolling interests					$ 1,242,000
AXT-Tongmei, Inc \| Disposal Group, Disposed of by Sale, Not Discontinued Operations
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Cash consideration							$ 1
ChaoYang XinMei High Purity Semiconductor Materials Co., Ltd
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Investment value, agreement amount		$ 1,800,000	$ 3,000,000.0
Investments, equity method			$ 1,800,000
Ownership (as a percent)		58.50%	58.50%
Initial funding		$ 1,500,000	$ 1,500,000
Beijing Tongmei Xtal Technology
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Investment in new facility						$ 48,100,000
Raised additional capital				$ 1,500,000
Beijing BoYu Semiconductor Vessel Craftwork Technology Co., Ltd Investment
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Percentage of outstanding shares						33.00%
Percentage of ownership						67.00%		63.00%
Beijing Tongmei Xtal Technology
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Percentage of outstanding shares	7.28%				14.50%
Private equity ownership percentage	7.28%				14.50%
Percentage of key managers and contributors purchased						0.40%
Investment in new facility	$ 49,000,000
Percentage of ownership					85.50%
Transaction results in increase to noncontrolling interests					$ 1,200,000
Transaction results in increase to redeemable noncontrolling interests					$ 1,200,000
Beijing Tongmei Xtal Technology \| Beijing Boyu Semiconductor Vessel Craftwork Technology Co Ltd
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Private equity ownership percentage						7.59%
Beijing Tongmei Xtal Technology \| Nanjing JinMei Gallium Co., Ltd
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Private equity ownership percentage						0.38%
Beijing Tongmei Xtal Technology \| ChaoYang XinMei High Purity Semiconductor Materials Co., Ltd
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Investment amount		$ 900,000	$ 900,000
Nanjing JinMei Gallium Co., Ltd Investment
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Line Items]
Percentage of outstanding shares						8.50%
Percentage of ownership									100.00%	97.00%