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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)
 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Cash Flows from Operating Activities:    
Net (loss) income $ (4,313,262) $ 1,224,401
Reconciliation of net (loss) income to net cash used in operating activities:    
Changes in fair value of warrant liabilities (4,500) (5,241,000)
Shares issued in debt settlement agreements 0 70,315
Stock-based compensation 647,387 544,934
Debt extinguishment gain (492,365) 0
Changes in operating assets and liabilities:    
Prepaid expenses and deposits (109,032) 47,409
Accounts payable and accrued expenses 336,135 570,033
Net cash used in operating activities (3,935,637) (2,783,908)
Cash Flows from Financing Activities:    
Repayment of promissory note 0 (25,000)
Proceeds from issuance of common stock and warrants in private placement, net of offering costs 5,408,343 0
Proceeds from exercise of stock warrants, net of offering costs 638,666 0
Net cash provided by (used in) financing activities 6,047,009 (25,000)
Net increase (decrease) in cash 2,111,372 (2,808,908)
Cash at beginning of period 7,851,243 6,576,564
Cash at end of period 9,962,615 3,767,656
Supplemental schedule of non-cash financing activities:    
Reclassification of accrued liability upon issuance of common shares relating to Dr. Glynn Wilson’s compensation 0 191,000
Fair value of repriced warrants as inducement $ 622,042 $ 0