RUBICON INVESTMENT (Details) - USD ($) $ / shares in Units, $ in Thousands			12 Months Ended
	Aug. 29, 2022	Aug. 19, 2022	Sep. 30, 2022	Sep. 30, 2021	Aug. 12, 2022	Jul. 13, 2022
Investment Owned, Balance [Abstract]
Common stock, par value (in dollars per share)			$ 0.001	$ 0.001
Purchase agreement acquired shares percentage			45.00%
Revalued Investments [Abstract]
Balance as of September 30, 2021			$ 0
Investment in Rubicon at fair value			2,371	$ 0
Equity Method Investment, Summarized Financial Information [Abstract]
Total assets			126,532	115,924
Total liabilities			108,205	97,805
Total revenues			316,863	146,419
Gross profit			66,197	32,433
Net income			(2,138)	5,203
Rubicon Technology, Inc. [Member]
Investment Owned, Balance [Abstract]
Common stock shares acquired (in shares)		1,108,000
Common stock, par value (in dollars per share)		$ 0.001			$ 0.001
Share price (in dollars per share)		$ 20
Purchase agreement acquired shares percentage		44.99%
Cash distribution record date	Aug. 23, 2022
Cash distribution (in dollars per share)	$ 11
Cash distribution	$ 12,188
Cash distribution paid date	Aug. 29, 2022
Revalued Investments [Abstract]
Balance as of September 30, 2021			0
Purchase of Rubicon investment			22,160
Fair value adjustments to Rubicon investment			(19,789)
Investment in Rubicon at fair value			2,371	$ 0
Equity Method Investment, Summarized Financial Information [Abstract]
Total assets			5,340
Total liabilities			2,337
Total revenues			3,883
Gross profit			1,505
Net income			$ 810
Rubicon Technology, Inc. [Member] | Maximum [Member]
Investment Owned, Balance [Abstract]
Percentage of shares to purchase under cash tender offer					45.00%	45.00%