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PROPERTY AND EQUIPMENT, NET (Details Textual) | 12 Months Ended |  |  |  | 12 Months Ended
--- | --- | --- | --- | --- | ---
Dec. 31, 2012 USD ($) | Dec. 31, 2011 USD ($) | Dec. 31, 2012 CNY | Dec. 31, 2011 CNY | Dec. 31, 2002 CNY | Dec. 31, 2012 Property, Plant and Equipment [Member] USD ($) | Dec. 31, 2011 Property, Plant and Equipment [Member] USD ($)
Depreciation and amortization | $ 552,086 | $ 450,518 |  |  |  | $ 471,727 | $ 450,518
Building Pledged as Collateral | 2,407,200 | 1,585,890 | 15,000,000 | 10,000,000 |  |  |
Land Use Rights Purchase Price |  |  |  |  | 1,944,000 |  |

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

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- Definition The purchase price of land use rights. + References No definition available. + Details
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Namespace Prefix: | dhrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- 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
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