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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 1)	12 Months Ended
	Dec. 31, 2012
Leasehold Improvements [Member]
Leasehold improvements	Shorter of the useful lives or the lease term
Building and Use Rights [Member] | Minimum [Member]
Useful Life (in years)	20 years
Building and Use Rights [Member] | Maximum [Member]
Useful Life (in years)	40 years
Machinery and Equipment [Member] | Minimum [Member]
Useful Life (in years)	10 years
Machinery and Equipment [Member] | Maximum [Member]
Useful Life (in years)	15 years
Furniture and Equipment [Member]
Useful Life (in years)	5 years
Vehicles [Member]
Useful Life (in years)	5 years

X

- Definition

Description of useful life for leasehold improvements.

+ References

No definition available.

+ Details

Name:	dhrm_UsefulLifeDescription
Namespace Prefix:	dhrm_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

+ References

No definition available.

+ Details

Name:	us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration