Equity Method Investments- Textuals (Details) shares in Millions				3 Months Ended			9 Months Ended
	Dec. 31, 2020 USD ($) shares	Nov. 08, 2019 USD ($)	Jun. 04, 2019	Dec. 31, 2020 USD ($) shares	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2020 USD ($) shares	Sep. 30, 2020 USD ($)	Dec. 31, 2019 USD ($)	Mar. 31, 2020 USD ($)
Schedule of Equity Method Investments
Stock split conversion ratio			1.5
Loss from equity method investments				$ (510,000)		$ 282,000	$ 546,000		$ 636,000
Equity method investments	$ 4,443,000			$ 4,443,000			$ 4,443,000			$ 5,208,000
Insignia
Schedule of Equity Method Investments
Number of shares held (in shares) | shares	0.5			0.5			0.5
Stock split conversion ratio	0.143
Ownership percentage	28.00%			28.00%			28.00%
Loss from equity method investments					$ 200,000			$ 1,000,000.0
Investment realized gain (loss) on disposal				$ (24,000.0)			$ (72,000.0)
Equity method investments	$ 200,000			200,000			200,000
Cadillac Castings, Inc
Schedule of Equity Method Investments
Ownership percentage		19.90%			18.98%			18.98%
Loss from equity method investments					$ (600,000)			$ (300,000)
Investment realized gain (loss) on disposal				(12,000.0)			(37,000.0)
Equity method investments	$ 3,500,000			$ 3,500,000			$ 3,500,000
Payments to acquire equity method investment		$ 2,800,000
Difference between carrying amount and underlying equity		$ 300,000