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Financial Instruments and Fair Value Measurements (Details) - USD ($) $ in Thousands	Sep. 30, 2021	Dec. 31, 2020
Assets:
Total assets	$ 7,252	$ 2,853
Liabilities:
Derivative liability		2,209
Simple Agreements for Future Equity	10,918
Total liabilities	10,918	2,209
Quoted Priced in Active Markets (Level 1)
Assets:
Total assets	7,252	2,853
Significant Unobservable Inputs (Level 3)
Liabilities:
Derivative liability		2,209
Simple Agreements for Future Equity	10,918
Total liabilities	10,918	2,209
Money market funds
Assets:
Money market funds	7,252	2,853
Money market funds | Quoted Priced in Active Markets (Level 1)
Assets:
Money market funds	$ 7,252	$ 2,853

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