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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands | Jun. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Current Assets: |  |
Cash and cash equivalents | $ 20,634 | $ 30,908
Restricted cash | 67 | 67
Trade receivables, net of allowances | 234 | 173
Amount due from sale of MST Franchise | 0 | 5,000
Prepaid and other expenses | 2,024 | 2,127
Total Current Assets | 22,959 | 38,275
Non-current prepaid expenses and other assets | 2,000 | 2,483
Total Assets | 24,959 | 40,758
Current Liabilities: |  |
Trade payables | 1,159 | 2,386
Accrued expenses | 4,379 | 4,381
Employee related obligations | 836 | 2,372
Liability for employee severance benefits | 0 | 206
Total Current Liabilities | 6,374 | 9,345
Other liabilities | 1,313 | 0
Total Liabilities | 7,687 | 9,345
Commitments and Contingencies |  |
Mezzanine Equity: |  |
Temporary equity, carrying amount, including portion attributable to noncontrolling interests | 0 | 211
Stockholders' Equity: |  |
Common stock: $0.0001 par value; 150,000,000 shares authorized at June 30, 2023 and December 31, 2022; 3,282,479 and 3,229,704 shares issued and outstanding at June 30, 2023 and December 31, 2022, respectively | 0 | 0
Additional paid-in capital | 695,836 | 693,937
Accumulated deficit | (678,564) | (662,735)
Total Stockholders' Equity | 17,272 | 31,202
Total Liabilities, Mezzanine Equity and Stockholders’ Equity | $ 24,959 | $ 40,758

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