Inventories, net (Details) - Schedule of Inventory, Current - USD ($)	Jun. 30, 2021	Mar. 31, 2021
Schedule of Inventory, Current [Abstract]
Purchased parts	$ 2,691,826	$ 2,912,599
Work-in-process	934,412	1,020,402
Finished goods	105	79,988
Less: Allowance for obsolete inventory	(575,000)	(575,000)
Inventory, net	$ 3,051,343	$ 3,437,989

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Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation reserve for inventory.

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Amount before valuation and LIFO reserves of other supplies used within the manufacturing or production process expected to be consumed within one year or operating cycle, if longer.

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