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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2023 | Jun. 30, 2022
Cash flows from operating activities: |  |
Net (loss) | $ (15,846) | $ (7,757)
Adjustments to reconcile net loss to cash flows from operating activities: |  |
Depreciation | 3 | 3
Deferred tax assets | 0 | (685)
Bad debt | 11 | 0
Stock-based compensation | 1,364 | 1,590
Changes in assets and liabilities: |  |
Accounts receivables | (1) | (2)
Prepaid expenses and other assets | (79) | (134)
Accounts payable | 24 | 12
Accrued payroll and related expenses | 81 | 63
Accrued licensing costs | 0 | (355)
Other liabilities | (23) | (31)
Net cash used in operating activities | (14,466) | (7,296)
Cash flows from investing activities: |  |
Purchase of investments | (25,753) | (13,203)
Proceeds from sale or maturity of investments | 51,062 | 5,688
Net cash provided by (used in) investing activities | 25,309 | (7,515)
Cash flows from financing activities: |  |
Payment of dividends | (71,429) | 0
Payment of payroll taxes on vested restricted stock units | (5) | (29)
Net cash used in financing activities | (71,434) | (29)
Net change in cash and cash equivalents | (60,591) | (14,840)
Cash and cash equivalents, beginning of period | 86,561 | 142,018
Cash and cash equivalents, end of period | 25,970 | 127,178
Cash paid for income taxes | $ 0 | $ 2

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