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Subsequent Event (Details) - USD ($) | 1 Months Ended | 2 Months Ended | 3 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Aug. 31, 2022 | Jul. 31, 2022 | Jun. 30, 2021 | May 31, 2021 | Feb. 28, 2021 | Aug. 31, 2022 | Jun. 30, 2022 | Jun. 30, 2021 | Mar. 31, 2021 | May 31, 2022 | Apr. 30, 2022 | Jan. 31, 2022
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Investment in subsidiary with noncontrolling interest | $ 334,000 |  |  |  |  |  | $ 1,179,000 | $ 575,000 | $ 576,000 |  |  |
Secured debt | NingBo Bank | Beijing Tongmei Xtal Technology |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity |  |  |  |  |  |  | $ 1,500,000 |  |  |  |  |
Interest rate |  |  |  |  |  |  | 4.80% |  |  |  |  |
Xiaoyi XingAn Gallium Co., Ltd. |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Dividend received |  |  | $ 774,000 |  |  |  |  |  |  |  |  |
ChaoYang XinMei High Purity Semiconductor Materials Co., Ltd |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Initial funding |  |  |  | $ 1,500,000 | $ 1,500,000 |  |  |  |  |  |  |
Percentage of ownership, equity method |  |  |  | 58.50% | 58.50% |  |  |  |  | 58.50% | 58.50% | 58.50%
Subsequent Event | Secured debt | NingBo Bank | Beijing Tongmei Xtal Technology |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Maximum borrowing capacity | $ 1,500,000 |  |  |  |  | $ 1,500,000 |  |  |  |  |  |
Interest rate | 4.80% |  |  |  |  | 4.80% |  |  |  |  |  |
Subsequent Event | ChaoYang XinMei High Purity Semiconductor Materials Co., Ltd |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Initial funding |  |  |  |  |  | $ 1,000,000.0 |  |  |  |  |  |
Investment in subsidiary with noncontrolling interest |  | $ 600,000 |  |  |  |  |  |  |  |  |  |
Increase in noncontrolling interest | $ 406,000 | 610,000 |  |  |  |  |  |  |  |  |  |
Increase in redeemable noncontrolling interests | $ 73,000 | 57,000 |  |  |  |  |  |  |  |  |  |
Subsequent Event | Xiaoyi XingAn Gallium Co., Ltd. |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Dividend received |  | $ 1,500,000 |  |  |  |  |  |  |  |  |  |
Subsequent Event | ChaoYang XinMei High Purity Semiconductor Materials Co., Ltd |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Percentage of ownership, equity method |  | 58.50% |  |  |  |  |  |  |  |  |  |
Subsequent Event | ChaoYang XinMei High Purity Semiconductor Materials Co., Ltd | Beijing Tongmei Xtal Technology |  |  |  |  |  |  |  |  |  |  |  |
Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Investment in subsidiary with noncontrolling interest |  | $ 800,000 |  |  |  |  |  |  |  |  |  |

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