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 ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Cash flows from operating activities    
Net loss $ (1,859,991) $ (1,349,270)
Adjustments to reconcile net loss to net cash used in operating activities:    
Accrued income on marketable securities (13,955) (326)
Depreciation and amortization 56,452 60,718
Reserve and write-off for obsolete inventory 24,460 (32,333)
Reserve for doubtful accounts 40,859
Amortization of deferred compensation 3,469 5,203
Share based compensation to employees - options 2,712 5,036
Share based compensation to employees - restricted stock 5,175
Share based compensation to non-employees - restricted stock 12,545
Changes in assets and liabilities:    
Decrease in trade receivables 547,773 43,351
Decrease in trade receivables - related party 7,458
(Increase)/decrease in deposits and other receivables (12,905) 10,692
Increase in deposit and other receivables - related party (33,243)
Increase in inventories (50,795) (100,878)
(Increase)/decrease in prepaid expenses (89,497) 69,930
Decrease in prepaid expenses - related party 12,927 16,140
Decrease in trade and other payables (384,683) (200,059)
Decrease in trade and other payables - related party (20,816) (138,184)
Net cash used in operating activities (1,800,372) (1,561,663)
Cash flows from investing activities    
Purchases of property, plant and equipment (37,827) (16,774)
Purchases of marketable securities (3,972,386) (1,202,210)
Proceeds from sale of marketable securities 302,095 1,095,218
Net cash used in investing activities (3,708,118) (123,766)
Cash flows from financing activities    
Net proceeds from issuance of common stock 3,452,861
Net proceeds from exercise of warrants for common stock 5,717,325 244,950
Net cash provided by financing activities 5,717,325 3,697,811
Net increase in cash 208,835 2,012,382
Cash at beginning of period 438,432 72,700
Cash at end of period 647,267 2,085,082
Supplemental Schedule of Non-Cash Financing and Investing Activities    
Net unrealized gains/(losses) on marketable securities (16,843) 156
Conversion of Series B Preferred Stock to common shares $ 1,755,000