XML 57 R45.htm IDEA: XBRL DOCUMENT v2.4.0.6

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2)	12 Months Ended
	Dec. 31, 2012
Leasehold improvements	Shorter of the useful lives or the lease term
Software Copyrights [Member]
Intangible Asset Useful Life (in years)	20 years
Other Software [Member]
Intangible Asset Useful Life (in years)	5 years

X

- Definition

Useful life of long lived, intangible assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format.

+ References

No definition available.

+ Details

Name:	dhrm_IntangibleAssetUsefulLife
Namespace Prefix:	dhrm_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

A description of the finite or indefinite-lived intangible asset (excluding goodwill) that is impaired.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 3

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16373-109275

+ Details

Name:	us-gaap_ImpairedIntangibleAssetDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration