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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2022 | Jun. 30, 2021
Cash flows from operating activities: |  |
Net loss | $ (6,950) | $ (9,610)
Adjustments to reconcile net income to net cash provided by operating activities: |  |
Stock-based compensation expense | 1,815 | 3,666
Common stock contribution to 401(k) | 85 | 90
Depreciation | 3 | 4
Amortization of debt issuance costs, debt discount and final payment on debt |  | 200
Non-cash lease expense | 84 | 79
Loss on extinguishment of debt |  | 300
Change in fair value of equity securities | 251 | (617)
Changes in assets and liabilities: |  |
Trade and other receivables, net | 204 | 251
Income tax receivable |  | 1,526
Prepaid expenses and other assets | (398) | (701)
Accounts payable and accrued liabilities | 582 | 748
Income tax payable | (91) |
Operating lease liabilities | (96) | (88)
Unearned revenue recognized under units-of-revenue method | (815) | (731)
Other liabilities |  | (6)
Net cash used in operating activities | (5,326) | (4,889)
Cash flows from investing activities: |  |
Payment of contingent consideration under RPAs and CPPAs | (5,000) |
Payments related to purchase of royalty rights and other commercial payment rights |  | (13,500)
Net cash used in investing activities | (5,000) | (13,500)
Cash flows from financing activities: |  |
Proceeds from issuance of preferred stock |  | 40,000
Payment of preferred stock dividends | (2,736) | (707)
Payment of preferred and common stock issuance costs |  | (3,106)
Proceeds from exercise of options | 1,905 | 1,355
Taxes paid related to net share settlement of equity awards | (1,038) | (355)
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 | (1,869) | 15,810
Net decrease in cash, cash equivalents and restricted cash | (12,195) | (2,579)
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 | 83,182 | 83,785
Supplemental Cash Flow Information: |  |
Cash paid for taxes | 95 |
Cash paid for interest |  | 311
Non-cash investing and financing activities: |  |
Preferred stock dividend accrual | $ 1,368 | 1,424
Accrued cost related to issuance of preferred stock |  | $ 105

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