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STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Jun. 30, 2020 | Jun. 30, 2019 | Jun. 30, 2018
Cash flows from operating activities: |  |  |
Net loss | $ (46,016) | $ (16,819) | $ (40,068)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities: |  |  |
Change in fair value of warrant liability | 22,870 | (27,632) | 9,705
Financing costs associated with warrants |  |  | 2,367
Share-based compensation | 6,801 | 6,562 | 3,217
Impairment of intangible assets | 227 |  |
Depreciation and amortization | 109 | 80 | 53
Changes in operating assets and liabilities: |  |  |
Receivable for foreign tax withholding | (20,420) |  |
Prepaid expenses and other current assets | (3,159) | (849) | 172
Accounts payable | (2,350) | 1,144 | 3,058
Accrued liabilities | 1,470 | 1,105 | 669
Deferred revenue | 74,726 | 6,986 | (208)
Net cash provided by (used in) operating activities | 34,258 | (29,423) | (21,035)
Cash flows from investing activities: |  |  |
Purchases of property and equipment | (894) | (217) |
Purchases of short-term investments | (190,279) | (64,655) | (114,233)
Proceeds from maturity of short-term investments | 84,879 | 89,190 | 69,906
Net cash (used in) provided by investing activities | (106,294) | 24,318 | (44,327)
Cash flows from financing activities: |  |  |
Proceeds from exercise of stock options | 272 | 372 | 329
Issuance of common stock, net | 69,231 | 220 | 70,151
Collection of common stock proceeds receivable | 5,274 |  |
Proceeds from exercise of warrants | 0 | 1,118 |
Payment of RSU tax withholdings in exchange for common shares surrendered by RSU holders |  | (324) | (267)
Net cash provided by financing activities | 74,777 | 1,386 | 70,213
Net increase (decrease) in cash and cash equivalents | 2,741 | (3,719) | 4,851
Cash and cash equivalents at beginning of the period | 9,590 | 13,309 | 8,458
Cash and cash equivalents at end of the period | 12,331 | 9,590 | 13,309
Supplemental cash flow information: |  |  |
Income taxes paid | $ (1) | (1) | $ (1)
Non-cash financing activities: |  |  |
Proceeds receivable- sale of common stock |  | 5,224 |
Proceeds receivable- stock option exercises |  | 50 |
Change in fair value of warrants exercised |  | $ 1,068 |

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