Quarterly report pursuant to Section 13 or 15(d)

Condensed Consolidated Statements of Cash Flows (Unaudited)

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Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)
6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Cash flows from operating activities    
Net loss $ (3,927,444) $ (2,167,279)
Adjustments to reconcile net loss to net cash used in operating activities:    
Accrued income on marketable securities (16,332) (1,001)
Depreciation and amortization 112,903 121,381
Reserve and write-off for obsolete inventory 32,283 21,542
Reserve for doubtful accounts 97,000 46,239
Amortization of deferred compensation 3,469 15,864
Share based compensation to employees - options 5,454 10,184
Share based compensation to employees - restricted stock 5,175
Share based compensation to non-employees - options 2,183
Share based compensation to non-employees - restricted stock 12,545
Changes in assets and liabilities:    
(Increase)/decrease in trade receivables 455,048 (372,502)
Decrease in trade receivables - related party 31,892
(Increase)/decrease in deposits and other receivables (13,698) 10,692
Increase in deposit and other receivables - related party (30,243)
Increase in inventories (99,220) (213,860)
(Increase)/decrease in prepaid expenses (548,144) 20,752
Decrease in prepaid expenses - related party 26,468 46,890
Increase in other assets (4,330)
Increase in trade and other payables 89,964 38,278
Decrease in trade and other payables - related party (23,120) (200,156)
Net cash used in operating activities (3,817,892) (2,593,231)
Cash flows from investing activities    
Purchases of property, plant and equipment (37,698) (37,191)
Purchases of marketable securities (5,268,754) (2,705,168)
Proceeds from sale of marketable securities 2,306,675 1,745,554
Net cash used in investing activities (2,999,777) (996,805)
Cash flows from financing activities    
Net proceeds from issuance of common stock 3,413,311
Net proceeds from exercise of warrants for common stock 7,155,200 301,200
Net cash provided by financing activities 7,155,200 3,714,511
Net increase in cash and restricted cash 337,531 124,475
Cash and restricted cash at beginning of period 438,432 72,700
Cash and restricted cash at end of period 775,963 197,175
Supplemental Schedule of Non-Cash Financing and Investing Activities    
Net unrealized gains/(losses) on marketable securities (12,443) 1,009
Issuance of a restricted common stock grant for services 5,455
Conversion of Series B Preferred Stock to common shares $ 1,755,000