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INCOME TAXES (Details) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Income Tax Disclosure [Line Items] |  |  |
Income tax provision (benefit) computed at statutory rate | $ (108,715)us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 515,658 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate | $ 852,640 us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate
Other | 58,724 us-gaap_IncomeTaxReconciliationOtherAdjustments | 6,621 us-gaap_IncomeTaxReconciliationOtherAdjustments | 10,155 us-gaap_IncomeTaxReconciliationOtherAdjustments
Effective Income Tax Rate Reconciliation Income Tax Expense Benefit | $ (49,991)dhrm_EffectiveIncomeTaxRateReconciliationIncomeTaxExpenseBenefit | $ 522,279 dhrm_EffectiveIncomeTaxRateReconciliationIncomeTaxExpenseBenefit | $ 862,795 dhrm_EffectiveIncomeTaxRateReconciliationIncomeTaxExpenseBenefit

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- Definition Effective Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations. + References No definition available. + Details
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- Definition The amount of income tax expense or benefit for the period computed by applying the domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32698-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Subparagraph 2 -Article 4 + Details
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- Definition Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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