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v3.19.2

Condensed Consolidated Statement of Cash Flows - USD ($) | 6 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
Cash flows from operating activities: |  |
Net loss | $ (1,462,444) | $ (1,987,005)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation expense | 6,301 | 1,879
Amortization of intangible assets | 72,562 | 294,632
Bad debt expense (benefit) | (54,000) |
Interest income on short-term investment |  | (4)
Stock-based compensation | 339,361 | 165,314
Changes in operating assets and liabilities: |  |
Accounts receivable | 351,820 | 778,191
Cost and estimated earnings in excess of billings on uncompleted contracts | 239,524 | (70,217)
Prepaid expenses and other current assets | 756,393 | (52,436)
Accounts payable and accrued expenses | (846,261) | (159,237)
Billings in excess of costs and estimated earnings on uncompleted contracts | (1,150,458) | (847,580)
Net cash used in operating activities | (1,747,202) | (1,876,463)
Cash flows provided by investing activities: |  |
Proceeds from short-term investment |  | 30,037
Purchase of property, plant and equipment |  | (3,784)
Net cash used in investing activities |  | 26,253
Cash flows from financing activities: |  |
Proceeds from public stock offering, net of issuance costs | 552,709 |
Net cash provided by financing activities | 552,709 |
Net decrease in cash and cash equivalents | (1,194,493) | (1,850,210)
Cash and cash equivalents - beginning of period | 1,368,395 | 4,870,824
Cash and cash equivalents - end of period | 173,902 | 3,020,614
Supplemental disclosure of non-cash investing and financing activities: |  |
Non cash conversion of salary liability to restricted stock units | $ 108,629 |

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