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

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.

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No definition available.

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The percentage of equity issued on conversion of non controlling interests.

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No definition available.

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- Definition

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

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No definition available.

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- Definition

Represents the percentage of ownership interest sold during the period.

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No definition available.

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- Definition

Represents the purchase by the parent of an additional equity interest in a subsidiary during the period, thereby effecting a change in total (consolidated) equity attributable to the parent. The purchase of the additional equity interest represented by this element increases the parent's controlling interest in the subsidiary.

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- References

No definition available.

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which is directly or indirectly attributable to that ownership interest in subsidiary equity which is not attributable to the parent (that is, noncontrolling interest, previously referred to as minority interest).

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

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No definition available.

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

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No definition available.

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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.

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No definition available.

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The Company and Summary of Significant Accounting Policies - Foreign Currency Translation (Details)		1 Months Ended			12 Months Ended
	Jun. 15, 2018 USD ($)	Aug. 31, 2020 USD ($)	May 31, 2019 USD ($)	Sep. 30, 2018 USD ($)	Dec. 31, 2020 USD ($) company	Dec. 31, 2019 USD ($) company	Dec. 31, 2018 USD ($)	Jul. 31, 2020	Jun. 01, 2019 USD ($)	Apr. 30, 2019	Mar. 11, 2019	Mar. 10, 2019	Aug. 31, 2018	Jun. 14, 2018
The Company and Summary of Significant Accounting Policies
Number of equity method investments \| company					5	5
Noncontrolling interests					$ 15,350,000	$ 4,877,000
Foreign Currency Translation
Foreign exchange gain (loss)					$ (411,000)	$ 321,000	$ 165,000
Beijing JiYa Semiconductor Material Co., Ltd
The Company and Summary of Significant Accounting Policies
Percentage of ownership, consolidated method (in hundredths)											39.00%	46.00%
Nanjing JinMei Gallium Co., Ltd Investment
The Company and Summary of Significant Accounting Policies
Percentage of ownership, consolidated method (in hundredths)			100.00%	97.00%						97.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners					8.50%
Chaoyang JinMei Gallium Co., Ltd[member]
The Company and Summary of Significant Accounting Policies
Percentage of ownership, consolidated method (in hundredths)		91.50%						100.00%
Beijing BoYu Semiconductor Vessel Craftwork Technology Co
The Company and Summary of Significant Accounting Policies
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners					33.00%
Beijing Tongmei Xtal Technology
The Company and Summary of Significant Accounting Policies
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners					8.37%
Percentage of Equity Purchased by Employees, Key Managers and Contributors					0.40%
Beijing Tongmei Xtal Technology \| Nanjing JinMei Gallium Co., Ltd
The Company and Summary of Significant Accounting Policies
Percentage of equity issued on conversion of non controlling interests					0.38%
Beijing Tongmei Xtal Technology \| Beijing BoYu Semiconductor Vessel Craftwork Technology Co
The Company and Summary of Significant Accounting Policies
Percentage of equity issued on conversion of non controlling interests					7.59%
Nanjing JinMei Gallium Co., Ltd Investment
The Company and Summary of Significant Accounting Policies
Purchase of subsidiary shares from noncontrolling interest	$ 1,400,000		$ 413,000	$ 252,000
Additional percentage of ownership, consolidated method	12		3	2
Noncontrolling interests									$ 0
Nanjing JinMei Gallium Co., Ltd Investment \| Nanjing JinMei Gallium Co., Ltd Investment
The Company and Summary of Significant Accounting Policies
Percentage of ownership, consolidated method (in hundredths)	95.00%				100.00%								95.00%	83.00%
Chaoyang JinMei Gallium Co., Ltd[member]
The Company and Summary of Significant Accounting Policies
Purchase of subsidiary shares from noncontrolling interest		$ 396,000
Percentage Of Ownership Interest Sold		8.50%
Chaoyang JinMei Gallium Co., Ltd[member] \| Chaoyang JinMei Gallium Co., Ltd[member]
The Company and Summary of Significant Accounting Policies
Percentage of ownership, consolidated method (in hundredths)		91.50%			100.00%			100.00%
Percentage Of Ownership Interest Sold		8.50%