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Inventories (Details Textual)	Mar. 31, 2019 USD ($)
Inventories (Textual)
Increase in inventory wasp system production	$ 3,800,000

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- Definition

Increase in inventory wasp system production.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

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- References

No definition available.

+ Details

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Namespace Prefix:	drne_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration