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ACCUMULATED OTHER COMPREHENSIVE INCOME - Changes in Accumulated Other Comprehensive Income by Component, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Changes in Other Comprehensive Income by Component, Net of Tax [Roll Forward]
Balance	$ 129,379	$ 80,024	$ 122,529	$ 78,043
Balance	134,768	82,245	134,768	82,245
Accumulated Other Comprehensive Income [Member]
Changes in Other Comprehensive Income by Component, Net of Tax [Roll Forward]
Balance	310	323	256	156
Other comprehensive income (loss)	(264)	94	(210)	261
Amount reclassified from accumulated other comprehensive income	(81)	(191)	(81)	(191)
Balance	(35)	226	(35)	226
Unrealized Gains and Losses on Available-for-Sale Debt Securities
Changes in Other Comprehensive Income by Component, Net of Tax [Roll Forward]
Balance	310	323	256	156
Other comprehensive income (loss)	(264)	94	(210)	261
Amount reclassified from accumulated other comprehensive income	(81)	(191)	(81)	(191)
Balance	$ (35)	$ 226	$ (35)	$ 226

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Amount after tax, before reclassification adjustments, of other comprehensive income (loss), attributable to parent.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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