Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statements of Cash Flows (Unaudited)

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Consolidated Statements of Cash Flows (Unaudited) - USD ($)
 3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Cash Flows From Operating Activities:    
Net loss $ (6,314,261) $ (8,061,583)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation expense 579,939 1,030,609
Depreciation expense 11,964 20,920
(Gain) loss on change in fair value of derivative liabilities (9,076) 255,995
(Increase) decrease in:    
Prepaid expenses and other current assets (348,330) 805,193
Increase in:    
Accounts payable and accrued expenses 620,520 573,934
Net Cash Used In Operating Activities (5,459,244) (5,374,932)
Cash Flows From Investing Activities:    
Purchase of property and equipment (6,991) (8,313)
Net Cash Used In Investing Activities (6,991) (8,313)
Cash Flows From Financing Activities:    
Sales of shares of common stock and warrants, net of offering costs 14,870,139 1,917,048
Net Cash Provided By Financing Activities 14,870,139 1,917,048
Net change in cash, cash equivalents, and restricted cash 9,403,904 (3,466,197)
Cash, cash equivalents, and restricted cash at beginning of period 17,790,576 20,554,027
Cash, cash equivalents, and restricted cash at end of period 27,194,480 17,087,830
Supplemental disclosures of cash flow information:    
Cash paid for interest
Cash paid for taxes
Supplemental disclosure of non-cash investing and financing activities:    
Stock issuance costs included in accounts payable and accrued expenses 1,115,686
Subscription receivable received subsequent to balance sheet date $ 56,284