Inventories (Details) - USD ($)	Dec. 31, 2018	Jun. 30, 2018
Inventory [Line Items]
Work-in progress	$ 507,437	$ 388,252
Component parts	7,201,175	6,775,870
Finished goods	2,048,274	2,285,836
Reserve for obsolete and excess inventories	(1,619,417)	(1,619,417)
Inventory, Net	$ 8,137,469	$ 7,830,541

Amount of inventory reserves for last-in first-out (LIFO) and other inventory valuation methods.

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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 before valuation and LIFO reserves of merchandise or goods in the production process expected to be completed within one year or operating cycle, if longer.

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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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