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CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($)
$ in Thousands
Sep. 30, 2023
Dec. 31, 2022
Current Assets:    
Cash and cash equivalents $ 15,448 $ 30,908
Restricted cash 54 67
Trade receivables, net of allowances 250 173
Amount due from sale of MST Franchise 0 5,000
Prepaid and other expenses 1,759 2,127
Total Current Assets 17,511 38,275
Non-current prepaid expenses and other assets 1,756 2,483
Total Assets 19,267 40,758
Current Liabilities:    
Trade payables 716 2,386
Accrued expenses 4,452 4,381
Employee related obligations 1,281 2,372
Liability for employee severance benefits 0 206
Total Current Liabilities 6,449 9,345
Other liabilities 1,313 0
Total Liabilities 7,762 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 September 30, 2023 and December 31, 2022; 3,304,781 and 3,229,704 shares issued and outstanding at September 30, 2023 and December 31, 2022, respectively 0 0
Additional paid-in capital 696,653 693,937
Accumulated deficit (685,148) (662,735)
Total Stockholders' Equity 11,505 31,202
Total Liabilities, Mezzanine Equity and Stockholders’ Equity $ 19,267 $ 40,758