Commitments and Contingencies (Details)	Apr. 06, 2015 USD ($)
Commitments and Contingencies (Textual)
Recovery of legal fees	$ 400,000

The amount of expense provided in the period for legal costs incurred on or before the balance sheet date pertaining to resolved, pending or threatened litigation, including arbitration and mediation proceedings.

No definition available.

Name:	drne_LossContingencyRecoveryOfLegalFees
Namespace Prefix:	drne_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration