v3.20.2
Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:    
Net loss $ (15,940,738) $ (11,128,889)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation 1,983,644 1,986,274
Amortization of debt discount 313,097
Non-cash interest expense 461,839
Non-cash operating lease expense 5,721
Inventory reserve 20,673
Depreciation 47,284 56,568
Changes in operating assets and liabilities:    
(Increase) decrease in trade receivables (5,833) 6,634
Decrease in inventory 110,889 45,010
Increase in prepaid expenses and other current assets (928,788) (155,484)
Increase (decrease) in accounts payable 961,641 (1,533,649)
Decrease in accrued expenses (2,286,439) (1,212,100)
Decrease in deferred revenue (2,206) (6,618)
Net cash used in operating activities (16,034,152) (11,167,318)
CASH FLOWS FROM INVESTING ACTIVITIES:    
Purchase of short-term investments (5,870,456) (13,716,503)
Maturity of short-term investments 15,179,649 1,426,927
Purchase of equipment (35,553) (27,142)
Net cash provided by (used in) investing activities 9,273,640 (12,316,718)
CASH FLOWS FROM FINANCING ACTIVITIES:    
Proceeds from the public offering, net 21,320,170
Proceeds from sale of common stock from at-the-market program, net 3,045,730 15,234,529
Proceeds from exercise of warrants 411,751 8,658,233
Proceeds from exchange agreement, related party 2,000,000
Proceeds from exercise of stock options 117,529
Net cash provided by financing activities 24,777,651 26,010,291
Foreign exchange effect on cash 5,126 (6,232)
NET INCREASE IN CASH 18,022,265 2,520,023
CASH, CASH EQUIVALENTS AND RESTRICTED CASH – BEGINNING OF PERIOD 16,525,187 17,795,323
CASH, CASH EQUIVALENTS AND RESTRICTED CASH – END OF PERIOD 34,547,452 20,315,346
Cash paid for interest 27,904 6,276
Supplemental Disclosure of Non-Cash Financing Activities:    
Deemed dividend as a result of warrant modification 369,500
Deemed dividend as a result of exchange of convertible note, Series C-2, Series D and Series F convertible preferred stock, related party 26,733,098
Conversion of preferred stock to common stock 50
Unrealized gain (loss) from investments (193) 4,714
Right-of-use assets obtained in exchange for lease liability 1,042,000 5,000
Issuance of common stock for vested restricted stock units $ 2 $ 19