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Equity Method Investments - Textuals (Details) - USD ($) shares in Millions	3 Months Ended		6 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Mar. 31, 2022	Mar. 31, 2021
Schedule of Equity Method Investments
Equity method investments	$ 11,559,000		$ 11,559,000		$ 9,864,000
Income (loss) from equity method investments	266,000	$ 14,000	798,000	$ 97,000
Promissory Note - CCI
Schedule of Equity Method Investments
Principle amount	$ 2,000,000		$ 2,000,000
Insignia
Schedule of Equity Method Investments
Number of shares held (in shares)	0.5		0.5
Ownership percentage	27.00%		27.00%
Equity method investments						$ 0
Income (loss) from equity method investments			$ 0
Cadillac Castings, Inc
Schedule of Equity Method Investments
Ownership percentage	20.91%		20.91%
Equity method investments	$ 3,400,000		$ 3,400,000
Income (loss) from equity method investments	400,000		700,000
Difference between carrying amount and underlying equity	300,000		300,000
Investment realized gain (loss) on disposal	$ 12,000		$ 25,000.0