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TAX RECEIVABLE (Details Textual)	12 Months Ended
	Dec. 31, 2012
Standard Vat Rate	17.00%

X

- Definition

Represents the standard percentage of value added tax on gross sale price.

+ References

No definition available.

+ Details

Name:	dhrm_StandardVatRate
Namespace Prefix:	dhrm_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration