Net Loss Per Share - Additional Information (Detail)	Jun. 30, 2015 USD ($)
Earnings Per Share [Abstract]
Contractual obligation to preferred stockholders	$ 0

Contractual obligation related to preferred stock holders.

No definition available.

Name:	dnai_ContractualObligationRelatedToPreferredStockHolders
Namespace Prefix:	dnai_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant