Represents the ratio of revenues from major customers to total revenues.

No definition available.

Name:	diri_RatioOfRevenuesFromMajorCustomersToTotalRevenues
Namespace Prefix:	diri_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

NATURE OF BUSINESS (Details)	3 Months Ended		6 Months Ended
NATURE OF BUSINESS (Details)	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
NATURE OF BUSINESS [Abstract]
Number of major customers			3
Revenues [Member]
Concentration Risk [Line Items]
Ratio of Revenues from Major Customers to Total Revenues	85.40%	93.60%	86.60%	92.60%