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Condensed Consolidated Statements of Cash Flows (Parenthetical) (Unaudited) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Statement of Cash Flows [Abstract]    
Proceeds from issuance of series F preferred stock, net of placement fees $ 248,000
Proceeds from issuance of series A warrants net of placement fees $ 248,000