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Consolidated Balance Sheets - USD ($) $ in Thousands | Jun. 30, 2019 | Jun. 30, 2018
--- | --- | ---
Current assets |  |
Cash and cash equivalents | $ 1,588 | $ 552
Short-term investments |  | 3,551
Accounts receivable | 3 | 12
Inventory: |  |
Raw materials, net | 150 | 7
Work-in-process | 181 |
Income tax receivable | 429 |
Prepaid expenses and other current assets | 371 | 154
Total current assets | 2,722 | 4,276
Property and equipment, net | 469 | 733
Long-term investments |  | 50
Long-term tax receivable | 429 |
Other assets | 72 | 81
Total assets | 3,692 | 5,140
Current liabilities |  |
Accounts payable | 160 | 112
Payroll related accruals | 319 | 412
Accrued expenses and other liabilities | 357 | 434
Income tax payable | 2 | 2
Total current liabilities | 838 | 960
Other liabilities | 146 | 188
Total liabilities | 984 | 1,148
Commitments and contingencies (Note 13) |  |
Stockholders’ equity |  |
Common stock, $0.001 par value, 15,000,000 shares authorized; 6,184,698 and 4,496,873 shares issued at June 30, 2019 and 2018, respectively; 5,775,171 and 4,097,346 shares outstanding at June 30, 2019 and 2018, respectively | 190,571 | 190,570
Treasury stock, 399,916 and 399,527 shares at cost at June 30, 2019 and 2018, respectively | (4,129) | (4,128)
Additional paid-in capital | 7,964 | 1,745
Accumulated deficit | (191,698) | (184,164)
Accumulated other comprehensive loss |  | (31)
Total stockholders’ equity | 2,708 | 3,992
Total liabilities and stockholders’ equity | 3,692 | 5,140
Convertible Preferred Stock |  |
Stockholders’ equity |  |
Convertible preferred stock, $0.001 par value, 2,500,000 shares authorized; 280,898 and no shares of Series C and 280,898 and no shares of Series D issued and outstanding at June 30, 2019 and 2018, respectively |  |

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