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WARRANTS (Details 2) (Fair Value, Inputs, Level 2 [Member], USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011
Fair Value, Inputs, Level 2 [Member] |  |
Beginning balance | $ 96,469 | $ 318,109
Warrants issued | 97,505 | 0
Fair value change of the issued warrants included in earnings | 180,192 | (221,640)
Ending balance | $ 374,166 | $ 96,469

X
- Definition It represents the fair value of issued warrants. + References No definition available. + Details
Name: | dhrm_FairValueOfIssuedWarrants
Namespace Prefix: | dhrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Fair Value of outstanding derivative securities that permit the holder the right to purchase securities (usually equity) from the issuer at a specified price. + References No definition available. + Details
Name: | dhrm_WarrantsAndRightsOutstandingFairValue
Namespace Prefix: | dhrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Fair value of warrants issued. + References No definition available. + Details
Name: | dhrm_WarrantsIssuedAtFairValue
Namespace Prefix: | dhrm_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration