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Consolidated Statements of Cash Flows - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Cash flows from operating activities: |  |
Net loss | $ (9,680,000) | $ (11,173,000)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Common stock issued for services | 342,000 | 194,000
Share based payments | 369,000 | 645,000
Depreciation and amortization | 297,000 | 208,000
Abandonment and impairment of capitalized patents pending | 0 | 1,971,000
Deferred Rent | 0 | (17,000)
Change in operating assets and liabilities: |  |
Contract assets | (184,000) | 0
Accounts receivable | 103,000 | (103,000)
Prepaid expenses and other assets | 169,000 | (332,000)
Accounts payable and accrued liabilities | 13,000 | 260,000
Accrued compensation and taxes | 428,000 | (440,000)
Contract liabilities | (115,000) | 115,000
Net cash used in operating activities | (8,258,000) | (8,672,000)
Cash flows from investing activities: |  |
Acquisition of fixed assets | (94,000) | (137,000)
Disbursements for patents and other intangible assets | (327,000) | (917,000)
Net cash used in investing activities | (421,000) | (1,054,000)
Cash flows from financing activities: |  |
Proceeds from issuance of units of common stock and warrants for cash, net of offering costs | 8,667,000 | 0
Net cash provided by financing activities | 8,667,000 | 0
Net decrease in cash and cash equivalents | (12,000) | (9,726,000)
Cash and cash equivalents, beginning of year | 1,259,000 | 10,985,000
Cash and cash equivalents, end of year | $ 1,247,000 | $ 1,259,000

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