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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Cash flows from operating activities: |  |
Net (loss) income | $ (17,104) | $ 15,798
Adjustments to reconcile net (loss) income to net cash (used in) provided by operating activities: |  |
Stock-based compensation expense | 3,608 | 6,195
Common stock contribution to 401(k) | 85 | 90
Depreciation | 7 | 7
Amortization of debt issuance costs, debt discount and final payment on debt |  | 200
Loss on extinguishment of debt |  | 300
Reduction of contingent NIH refund liability |  | (105)
Non-cash lease expense | 170 | 160
Change in fair value of equity securities | 439 | 919
Amortization of intangible assets | 97 |
Changes in assets and liabilities: |  |
Trade and other receivables, net | 208 | 54
Income tax receivable |  | 1,526
Prepaid expenses and other assets | (71) | (169)
Accounts payable and accrued liabilities | 1,845 | 765
Income taxes payable | (91) | 91
Operating lease liabilities | (195) | (179)
Unearned revenue recognized under units-of-revenue method | (1,877) | (1,642)
Contingent NIH refund liability |  | (1,305)
Other liabilities |  | (27)
Net cash (used in) provided by operating activities | (12,879) | 22,678
Cash flows from investing activities: |  |
Payments of consideration under RPAs and CPPAs | (8,000) | (26,500)
Receipts under RPAs and CPPAs | 3,026 |
Payment for IP acquired under the ObsEva IP Acquisition Agreement | (15,247) |
Net cash used in investing activities | (20,221) | (26,500)
Cash flows from financing activities: |  |
Proceeds from issuance of preferred stock |  | 40,000
Payment of preferred stock dividends | (5,472) | (3,499)
Payment of preferred and common stock issuance costs |  | (3,385)
Proceeds from exercise of options and other share-based compensation | 2,419 | 1,584
Taxes paid related to net share settlement of equity awards | (1,398) | (488)
Principal payments - debt |  | (4,250)
Payment for extinguishment of debt |  | (17,103)
Payment for debt modification fee |  | (24)
Net cash (used in) provided by financing activities | (4,451) | 12,835
Net (decrease) increase in cash, cash equivalents and restricted cash | (37,551) | 9,013
Cash and restricted cash at the beginning of the period | 95,377 | 86,364
Cash, cash equivalents and restricted cash at the end of the period | 57,826 | 95,377
Supplemental Cash Flow Information: |  |
Cash paid for taxes | 76 |
Cash paid for interest |  | 311
Non-cash investing and financing activities: |  |
Estimated fair value of contingent consideration under the Affitech CPPA |  | 8,000
Preferred stock dividend accrual | 1,368 | $ 1,368
Accrued transaction costs in connection with ObsEva IP Acquisition | $ 122 |

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