INVESTMENTS IN SECURITIES AND DERIVATIVE INSTRUMENTS - Narratives (Details) - USD ($)		2 Months Ended	12 Months Ended
	Mar. 30, 2023	Feb. 24, 2022	Mar. 31, 2024	Mar. 31, 2023	Apr. 01, 2024	Jan. 07, 2022	Aug. 31, 2021
Derivatives, Fair Value
Interest rate stated percentage (as a percentage)					21.00%
Long-term debt gross			$ 113,459,000	$ 125,914,000
Derivative loss		$ 100,000
Derivative, Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]			Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest
Repayments of long-term debt			$ 28,341,000	27,850,000
Unrealized gain			20,000	998,000
Gross gain from derivative instrument			200,000	0
Gross loss from derivative instrument			400,000	300,000
Gain from equity investments			1,600,000	500,000
Loss from equity investments				900,000
Loss on equity securities			2,100,000
Net unrealized losses recognized during the reporting period on equity securities still held at the reporting date			(473,000)	(389,000)
Fair Value, Inputs, Level 2
Derivatives, Fair Value
Derivative asset			1,909,000	2,420,000
Unsecured Debt | Contrail Debt
Derivatives, Fair Value
Interest rate stated percentage (as a percentage)						4.68%
Long-term debt gross			28,394,000	50,621,000		$ 43,600,000
Repayments of long-term debt	$ 6,700,000
Interest Rate Swap
Derivatives, Fair Value
Unrealized gain			(20,000)	(1,000,000)
Unrealized gain on other comprehensive (loss)			800,000
Interest Rate Swap | Fair Value, Inputs, Level 2
Derivatives, Fair Value
Derivative asset			1,900,000	2,400,000
Parent Company | Unsecured Debt
Derivatives, Fair Value
Long-term debt gross			$ 45,679,000	47,963,000
Term Note A - MBT | Parent Company | Unsecured Debt
Derivatives, Fair Value
Interest rate stated percentage (as a percentage)			3.42%				3.42%
Long-term debt gross			$ 6,955,000	7,762,000
Term Note A - MBT | Parent Company | Interest Rate Swap | Unsecured Debt
Derivatives, Fair Value
Interest rate stated percentage (as a percentage)			4.56%
Term Note D - MBT | Parent Company | Unsecured Debt
Derivatives, Fair Value
Long-term debt gross			$ 1,271,000	$ 1,338,000
Term Note D - MBT | Parent Company | Interest Rate Swap | Unsecured Debt
Derivatives, Fair Value
Interest rate stated percentage (as a percentage)			5.09%