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v3.19.1

Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017
CASH FLOWS FROM OPERATING ACTIVITIES: |  |
Net loss | $ (3,963,576) | $ (6,020,505)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation and amortization | 245,548 | 412,351
Stock-based compensation expense | 186,707 | 435,679
Change in provision for doubtful accounts | 5,925 |
Deferred rent | (5,202) | (47,628)
Impairment of intangible assets |  | 1,375,422
Changes in assets and liabilities: |  |
(Increase) in accounts receivable | (372,732) | (150,501)
Decrease (increase) in inventory | 2,984 | (14,774)
(Increase) in other current assets | (50,931) | (52,051)
Decrease (increase) in other assets | 57,439 | (5,883)
(Decrease) increase in accounts payable and accrued expenses | (74,672) | 339,326
(Decrease) in deferred revenue | (93,694) | (175,128)
(Decrease) increase in other long-term liabilities | (158,407) | 158,407
Net cash used in operating activities | (4,220,611) | (3,745,285)
CASH FLOWS FROM INVESTING activities: |  |
Purchases of property and equipment | (141,526) | (37,614)
Collection on note receivable | 40,472 | 42,460
Net cash (used in) provided by investing activities | (101,054) | 4,846
CASH FLOWS FROM FINANCING ACTIVITIES: |  |
Net proceeds from the issuance of common stock |  | 8,512,861
Net proceeds from issuance of common stock from exercise of stock options | 687,521 | 10,100
Net proceeds from the issuance of common stock from exercise of warrants |  | 139,700
Withholding taxes paid on vesting of restricted stock units |  | (4,233)
Net cash provided by financing activities | 687,521 | 8,658,428
Net (decrease) increase in cash | (3,634,144) | 4,917,989
CASH, beginning of year | 8,010,161 | 3,092,172
CASH, end of year | $ 4,376,017 | $ 8,010,161

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