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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Operating activities: |  |
Net loss | $ (7,830,000) | $ (7,288,000)
Adjustments to reconcile net loss to net cash used in operating activities: |  |
Depreciation | 20,000 | 29,000
Gain on disposal of property and equipment | (38,000) |
Stock-based compensation | 466,000 | 331,000
Changes in lease liability | (71,000) |
Changes in operating assets and liabilities: |  |
Prepaid expenses and other assets | 214,000 | (327,000)
Accounts payable and other current liabilities | (2,208,000) | 554,000
Net cash used in operating activities | (9,447,000) | (6,701,000)
Investing activities: |  |
Purchase of property, plant and equipment | (10,000) | (39,000)
Proceeds from sale of property and equipment | 38,000 | 16,000
Net cash provided by (used in) investing activities | 28,000 | (39,000)
Financing activities: |  |
Proceeds from issuance of common stock, net of issuance costs | 4,049,000 | 630,000
Payment of preferred stock dividend | (201,000) | (201,000)
Net cash provided by (used in) financing activities | 3,848,000 | 429,000
Effect of exchange rate changes on cash and cash equivalents | (48,000) | (95,000)
Net (decrease) in cash and cash equivalents | (5,619,000) | (6,406,000)
Cash and cash equivalents at beginning of period | 17,504,000 | 23,910,000
Cash and cash equivalents at end of period | 11,885,000 | 17,504,000
Supplemental cash flow information: |  |
Cash received during the period for: Interest | 224,000 | 238,000
Cash received during the period for: Taxes | 1,163,000 | 1,158,000
Lease liability | (1,505,000) |
Right-of-use asset | 1,385,000 |
Non cash financing activities: |  |
Accrual of preferred stock dividends | $ 50,000 | $ 50,000

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