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STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Thousands | Total | Common Shares | Additional paid in capital | Accumulated Deficit
--- | --- | --- | --- | ---
Beginning Balance at Jun. 30, 2017 | $ 50,838 |  | $ 36,772 | $ 225,169 | $ (174,331)
Net loss | (40,068) |  |  |  | (40,068)
Issuance of common stock in private placement, net (Note 8) | 35,910 |  | 33,003 | 35,910 |
Issuance of common stock for milestone payment, net (Note 10) | 500 |  | 167 | 500 |
Issuance of common stock for vested restricted stock units | (267) |  | 271 | (267) |
Exercise of stock options | 329 |  | 193 | 329 |
Share-based compensation expense | 3,217 |  |  | 3,217 |
Ending Balance at Jun. 30, 2018 | 50,459 |  | 70,406 | 264,858 | (214,399)
Net loss | (16,819) | [1] |  |  | (16,819)
Issuance of common stock, net | 5,444 |  | 2,215 | 5,444 |
Exercise of warrants | 2,186 |  | 440 | 2,186 |
Issuance of common stock for vested restricted stock units | (324) |  | 246 | (324) |
Exercise of stock options | 422 |  | 238 | 422 |
Share-based compensation expense | 6,562 |  |  | 6,562 |
Ending Balance at Jun. 30, 2019 | 47,930 |  | 73,545 | 279,148 | (231,218)
Net loss | (46,016) | [1] |  |  | (46,016)
Issuance of common stock, net | 69,231 |  | 37,815 | 69,231 |
Exercise of stock options | 272 |  | 154 | 272 |
Share-based compensation expense | 6,801 |  |  | 6,801 |
Ending Balance at Jun. 30, 2020 | $ 78,218 |  | $ 111,514 | $ 355,452 | $ (277,234)
[1] | We have experienced large changes in our net loss which relates to the change in fair value of the warrant liability for the years ended June 30, 2020 and 2019. Refer to Note 1 for further discussion.

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