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Accrued Expenses and Other Current Liabilities (Details) - Schedule of accrued expenses and other current liabilities - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
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Schedule of accrued expenses and other current liabilities [Abstract] |  |
Accrued legal and professional services | $ 2,216 | $ 968
Accrued salary and other employee liabilities | 1,271 | 1,327
Accrued cash interest and unfunded fees | 1,236 | 1,068
Other accrued liabilities | 296 | 198
Total | $ 5,019 | $ 3,561

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