ACCUMULATED OTHER COMPREHENSIVE INCOME - Changes in Accumulated Other Comprehensive Income by Component, Net of Tax (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2022	Jun. 30, 2021
Changes in Other Comprehensive Income by Component, Net of Tax [Roll Forward]
Balance	$ 134,768	$ 129,379	$ 122,529	$ 82,245	$ 80,024	$ 78,043	$ 122,529	$ 78,043
Net current period other comprehensive income (loss)	(241)	(345)	54	27	(97)	167	(532)	97
Balance	167,391	134,768	129,379	115,238	82,245	80,024	167,391	115,238
Accumulated Other Comprehensive Income [Member]
Changes in Other Comprehensive Income by Component, Net of Tax [Roll Forward]
Balance	(35)	310	256	226	323	156	256	156
Net current period other comprehensive income (loss)	(241)	(345)	54	27	(97)	167
Balance	(276)	$ (35)	310	253	$ 226	323	(276)	253
Unrealized Gains and Losses on Available-for-Sale Debt Securities
Changes in Other Comprehensive Income by Component, Net of Tax [Roll Forward]
Balance			$ 256			$ 156	256	156
Other comprehensive income (loss)							(451)	288
Amount reclassified from accumulated other comprehensive income							(81)	(191)
Net current period other comprehensive income (loss)							(532)	97
Balance	$ (276)			$ 253			$ (276)	$ 253

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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Reference 2: http://www.xbrl.org/2003/role/exampleRef
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+ Details