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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (DEFICIENCY) (USD $) | Common Stock | Additional Paid-In Capital | Deficit Accumulated | Total
--- | --- | --- | --- | ---
Beginning balance, value at Dec. 31, 2011 | $ 114,274 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 66,069,911 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (69,289,467)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ (3,105,282)us-gaap_StockholdersEquity
Beginning balance, shares at Dec. 31, 2011 | 114,273,470 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued upon exercise of warrants and options, shares issued | 12,563,944 zero_CommonStockIssuedUponExerciseOfWarrantsAndOptionsSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued upon exercise of warrants and options, amount | 12,564 zero_CommonStockIssuedUponExerciseOfWarrantsAndOptionsAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 3,669,317 zero_CommonStockIssuedUponExerciseOfWarrantsAndOptionsAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 3,681,881 zero_CommonStockIssuedUponExerciseOfWarrantsAndOptionsAmount
Common stock issued for convertible debt, shares issued | 14,305,156 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for convertible debt, value | 14,305 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 3,775,329 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 3,789,634 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments
Common stock issued for services, shares issued | 2,525,000 us-gaap_StockIssuedDuringPeriodSharesIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for services, value | 2,525 us-gaap_StockIssuedDuringPeriodValueIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 1,225,725 us-gaap_StockIssuedDuringPeriodValueIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 1,228,250 us-gaap_StockIssuedDuringPeriodValueIssuedForServices
Fair value of options and warrants issued as compensation |  | 2,712,173 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 2,712,173 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Fair value of warrants and beneficial conversion feature of issued convertible notes |  | 1,888,211 us-gaap_AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 1,888,211 us-gaap_AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature
Fair value of warrants issued to settle payables |  |  |  | 0 zero_FairValueOfWarrantsIssuedToSettlePayables
Net loss |  |  | (13,092,387)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (13,092,387)us-gaap_NetIncomeLoss
Ending balance, value at Dec. 31, 2012 | 143,668 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 79,340,666 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (82,381,854)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (2,897,520)us-gaap_StockholdersEquity
Ending balance, shares at Dec. 31, 2012 | 143,667,570 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued upon exercise of warrants and options, shares issued | 29,152,389 zero_CommonStockIssuedUponExerciseOfWarrantsAndOptionsSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued upon exercise of warrants and options, amount | 29,152 zero_CommonStockIssuedUponExerciseOfWarrantsAndOptionsAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 8,448,066 zero_CommonStockIssuedUponExerciseOfWarrantsAndOptionsAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 8,477,218 zero_CommonStockIssuedUponExerciseOfWarrantsAndOptionsAmount
Common stock issued for convertible debt, value |  |  |  | 0 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments
Common stock issued for services, shares issued | 50,000 us-gaap_StockIssuedDuringPeriodSharesIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for services, value | 50 us-gaap_StockIssuedDuringPeriodValueIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 48,950 us-gaap_StockIssuedDuringPeriodValueIssuedForServices / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 49,000 us-gaap_StockIssuedDuringPeriodValueIssuedForServices
Common stock issued to employees and directors as compensation, shares issued | 325,455 us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued to employees and directors as compensation, value | 325 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 369,788 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 370,113 us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation
Common stock issued as settlement, shares issued | 3,047,403 zero_CommonStockIssuedAsSettlementSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued as settlement, value | 3,048 zero_CommonStockIssuedAsSettlementValue / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 3,105,299 zero_CommonStockIssuedAsSettlementValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 3,108,347 zero_CommonStockIssuedAsSettlementValue
Fair value of options and warrants issued as compensation |  | 4,495,545 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 4,495,545 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Fair value of warrants and beneficial conversion feature of issued convertible notes |  |  |  | 0 us-gaap_AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature
Fair value of warrants issued to settle payables |  | 129,622 zero_FairValueOfWarrantsIssuedToSettlePayables / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 129,622 zero_FairValueOfWarrantsIssuedToSettlePayables
Net loss |  |  | (10,657,009)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (10,657,009)us-gaap_NetIncomeLoss
Ending balance, value at Dec. 31, 2013 | 176,243 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 95,937,936 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | (93,038,863)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 3,075,316 us-gaap_StockholdersEquity
Ending balance, shares at Dec. 31, 2013 | 176,242,817 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued upon exercise of warrants and options, shares issued | 4,710,947 zero_CommonStockIssuedUponExerciseOfWarrantsAndOptionsSharesIssued / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued upon exercise of warrants and options, amount | 4,711 zero_CommonStockIssuedUponExerciseOfWarrantsAndOptionsAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 1,408,573 zero_CommonStockIssuedUponExerciseOfWarrantsAndOptionsAmount / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 1,413,284 zero_CommonStockIssuedUponExerciseOfWarrantsAndOptionsAmount
Common stock issued for convertible debt, shares issued | 74,480 us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |
Common stock issued for convertible debt, value | 74 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 35,676 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 35,750 us-gaap_StockIssuedDuringPeriodValueConversionOfConvertibleSecuritiesNetOfAdjustments
Fair value of options and warrants issued as compensation |  | 730,726 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 730,726 us-gaap_AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
Fair value of warrants and beneficial conversion feature of issued convertible notes |  | 119,671 us-gaap_AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember |  | 119,671 us-gaap_AdjustmentsToAdditionalPaidInCapitalConvertibleDebtWithConversionFeature
Fair value of warrants issued to settle payables |  |  |  | 0 zero_FairValueOfWarrantsIssuedToSettlePayables
Net loss |  |  | (4,006,335)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (4,006,335)us-gaap_NetIncomeLoss
Ending balance, value at Dec. 31, 2014 | $ 181,028 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | $ 98,232,582 us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ (97,045,198)us-gaap_StockholdersEquity / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | $ 1,368,412 us-gaap_StockholdersEquity
Ending balance, shares at Dec. 31, 2014 | 181,028,244 us-gaap_SharesOutstanding / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember |  |  |

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