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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 | $ (4,844,021) | $ (4,512,680)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation expense | 6,764 | 2,955
Amortization of intangible assets | 589,619 | 587,823
Amortization of discount on convertible debentures |  | 330,388
Bad debt expense | 810,580 |
Interest income on short-term investment | (4) | (15)
Change in fair value of financial instruments |  | (96,327)
Loss on conversion of convertible instruments |  | 1,018,475
Non-cash consultant fee |  | 254,500
Stock-based compensation | 396,214 | 701,402
Loss on equity affiliates | 3,626 |
Changes in operating assets and liabilities: |  |
Accounts receivable | 448,969 | (2,771,357)
Cost and estimated earnings in excess of billings on uncompleted contracts | (199,150) | (27,826)
Inventory |  | 9,445
Prepaid expenses and other current assets | (802,797) | (59,170)
Intangible asset |  | (28,820)
Accounts payable and accrued expenses | 476,127 | 1,797,318
Billings in excess of costs and estimated earnings on uncompleted contracts | (338,161) | 1,624,570
Deferred revenue |  | (72,788)
Net cash used in operating activities | (3,452,234) | (1,242,107)
Cash flows provided by investing activities: |  |
Proceeds from short-term investment | 30,037 |
Purchase of property, plant and equipment | (71,306) | (4,192)
Purchase of intangible asset | (5,300) |
Investment in and advances to equity affiliates | (3,626) |
Net cash used in investing activities | (50,195) | (4,192)
Cash flows from financing activities: |  |
Proceeds from exercise of stock options |  | 8,409
Proceeds from public stock offering, net of issuance costs |  | 7,059,614
Payments on convertible debentures |  | (1,500,000)
Net cash provided by financing activities |  | 5,568,023
Net increase (decrease) in cash and cash equivalents | (3,502,429) | 4,321,724
Cash and cash equivalents - beginning of period | 4,870,824 | 549,100
Cash and cash equivalents - end of period | 1,368,395 | 4,870,824
Supplemental disclosure of non-cash investing and financing activities: |  |
Conversion of convertible debentures to common stock |  | 2,583,334
Conversion of preferred stock to common stock |  | $ 1,801,670

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