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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 9 Months Ended
--- | ---
Sep. 30, 2019 | Sep. 30, 2018
Cash flows from operating activities: |  |
Net income (loss) | $ 2,339 | $ (10,331)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: |  |
Fair value of Rezolute common stock shares received as consideration for license agreement |  | (955)
Stock-based compensation expense | 4,233 | 3,033
Common stock contribution to 401(k) | 102 | 20
Depreciation and amortization | 19 | 23
Amortization of debt issuance costs, debt discount and final payment on debt | 390 | 36
Loss on sublease |  | 1,421
Non-cash lease expense | (170) |
Change in fair value of long-term equity securities | (481) | 608
Other |  | (20)
Changes in assets and liabilities: |  |
Trade and other receivables | (2,358) | (918)
Prepaid expenses and other assets | (265) | (117)
Accounts payable and accrued liabilities | 232 | (1,778)
Unearned revenue recognized under units-of-revenue method | (772) | (96)
Income tax payable |  | (1,637)
Other liabilities | 594 | 779
Net cash provided by (used in) operating activities | 3,863 | (9,932)
Cash flows from investing activities: |  |
Purchase of property and equipment |  | (6)
Payments related to purchase of royalty rights | (19,300) | (15,000)
Net cash used in investing activities | (19,300) | (15,006)
Cash flows from financing activities: |  |
Proceeds from issuance of common stock, net of issuance costs | 17 | 2,331
Proceeds from exercise of options | 776 | 513
Proceeds from issuance of long-term debt | 9,500 | 7,500
Payment of preferred and common stock issuance costs | (377) |
Debt issuance costs and loan fees |  | (217)
Principal payments – finance lease | (11) | (10)
Taxes paid related to net share settlement of equity awards | (504) | (237)
Net cash provided by financing activities | 9,401 | 9,880
Effect of exchange rate changes on cash |  | 20
Net decrease in cash | (6,036) | (15,038)
Cash at the beginning of the period | 45,780 | 43,471
Cash at the end of the period | 39,744 | 28,433
Supplemental Cash Flow Information: |  |
Cash paid for interest | 357 |
Cash paid for taxes |  | 1,637
Non-cash investing and financing activities: |  |
Fair value of Rezolute common stock shares received as consideration for license agreement |  | 955
Interest added to principal balance on long-term debt | 376 | 281
Prepaid financing cost related to issuance of common stock |  | 100
Issuance of common stock warrant under SVB loan | 66 | $ 139
Estimated fair value of contingent consideration under the royalty purchase agreements | $ 75 |

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