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Consolidated Statements of Cash Flows (USD $)
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Cash flows from Operating Activities:    
Net income (loss) $ (140,627)us-gaap_NetIncomeLoss $ (474,162)us-gaap_NetIncomeLoss
Warrants issued for services 24,375us-gaap_AdjustmentOfWarrantsGrantedForServices 24,375us-gaap_AdjustmentOfWarrantsGrantedForServices
Adjustments to reconcile net earnings (loss) to net cash used in operating activities:    
Changes in operating assets and liabilities 384us-gaap_IncreaseDecreaseInOperatingCapital 9,223us-gaap_IncreaseDecreaseInOperatingCapital
Net cash used in operating activities (115,868)us-gaap_NetCashProvidedByUsedInOperatingActivities (440,564)us-gaap_NetCashProvidedByUsedInOperatingActivities
Effect of Exchange Rates on Cash (30,097)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents 266,478us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net increase (decrease) in cash (145,965)us-gaap_CashPeriodIncreaseDecrease (174,086)us-gaap_CashPeriodIncreaseDecrease
Cash - Beginning of period 1,206,177us-gaap_Cash 1,833,407us-gaap_Cash
Cash - End of period 1,060,212us-gaap_Cash 1,659,321us-gaap_Cash
Changes in operating assets and liabilities consists of:    
Increase (decrease) in accounts payable and accrued expenses 384us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities 9,223us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
Increase (decrease) in liabilities for uncertain tax positions      
Changes in assets and liabilities 384dltz_IncreaseDecreaseInCurrentOperatingCapital 9,223dltz_IncreaseDecreaseInCurrentOperatingCapital
Supplemental disclosure of cash flow information:    
Cash paid for interest      
Cash paid for income taxes