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Consolidated Statement of Stockholders' Equity (Parenthetical) (USD $) | 12 Months Ended
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Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Issuance cost on issuance of common stock and warrants | $ 1,335,327 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts | $ 2,051,699 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts | $ 900,992 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts
Common Stock [Member] |  |  |
Issuance cost on issuance of common stock and warrants | 1,335,327 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 2,051,699 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember | 900,992 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_CommonStockMember
Additional Paid-in Capital [Member] |  |  |
Issuance cost on issuance of common stock and warrants | $ 1,335,327 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 2,051,699 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember | $ 900,992 us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts / us-gaap_StatementEquityComponentsAxis = us-gaap_AdditionalPaidInCapitalMember

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- Definition Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 + Details
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