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PROPERTY AND EQUIPMENT, NET (Details Textual)	3 Months Ended		6 Months Ended
	Jun. 30, 2012 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2012 CNY	Dec. 31, 2011 USD ($)	Dec. 31, 2011 CNY
Depreciation, Depletion and Amortization	$ 127,724	$ 110,603	$ 246,448	$ 219,976
Building Pledged As Collateral	$ 2,360,295		$ 2,360,295		15,000,000	$ 1,585,890	10,000,000

X

- Definition

Carrying amount as of the balance sheet date of Buildings that have been pledged as collateral for borrowings.

+ References

No definition available.

+ Details

Name:	dhrm_BuildingPledgedAsCollateral
Namespace Prefix:	dhrm_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

+ Details

Name:	us-gaap_DepreciationDepletionAndAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration