BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Investment in Marketable Securities at fair value (Details) - USD ($) $ in Thousands |
Jun. 30, 2025 |
Sep. 30, 2024 |
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| BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES [Abstract] | ||
| Investment | $ 2,327 | $ 1,518 |
| Other Investments [Member] | ||
| BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES [Abstract] | ||
| Investment | $ 183 | $ 56 |
| Rubicon Technology, Inc. [Member] | ||
| BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES [Abstract] | ||
| Number of shares of common stock owned (in Shares) | 1,108,000 | 1,108,000 |
| Ownership percentage by parent | 46.60% | 46.60% |
| Investment | $ 2,327 | $ 1,518 |
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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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. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Number of shares of investment owned. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. No definition available.
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