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INVESTMENT SECURITIES - Available for sale (Details) - USD ($) $ in Thousands	Mar. 31, 2020	Mar. 31, 2019
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 145,529	$ 181,681
Gross Unrealized Gains	2,953	71
Gross Unrealized Losses	(191)	(3,526)
Estimated Fair Value	148,291	178,226
Municipal securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,740	8,885
Gross Unrealized Gains	137	30
Gross Unrealized Losses	0	(34)
Estimated Fair Value	4,877	8,881
Agency securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,009	12,426
Gross Unrealized Gains	17	22
Gross Unrealized Losses	(10)	(107)
Estimated Fair Value	6,016	12,341
Real estate mortgage investment conduits
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	42,663	40,835
Gross Unrealized Gains	1,128	0
Gross Unrealized Losses	0	(673)
Estimated Fair Value	43,791	40,162
Residential mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	58,700	77,402
Gross Unrealized Gains	1,415	7
Gross Unrealized Losses	(30)	(1,588)
Estimated Fair Value	60,085	75,821
Other mortgage-backed securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	33,417	42,133
Gross Unrealized Gains	256	12
Gross Unrealized Losses	(151)	(1,124)
Estimated Fair Value	$ 33,522	$ 41,021

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Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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