EARNINGS PER SHARE (Detail Textuals)	3 Months Ended
Oct. 31, 2017 shares
Earnings Per Share [Abstract]
Number of DSUs outstanding	891,434

Represents deferred share units ("DSUs") outstanding as of period.

No definition available.

Name:	dimn_DeferredShareUnitsOutstanding
Namespace Prefix:	dimn_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration