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Income Taxes (Details) - BFLY Operations Inc - USD ($) $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Operating Loss Carryforwards [Line Items] |  |  |
Tax provision |  | $ 40 |
valuation allowance increased | $ 39,600 | 39,600 | $ 25,000
Federal |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Net operating loss ("NOL") carryforwards | 330,200 | 330,200 | 205,500
Net operating loss ("NOL") carryforwards, subject to expire | 73,700 | 73,700 |
Net operating loss ("NOL") carryforwards, carried forward indefinitely | 256,500 | 256,500 |
Federal and state tax credits | 6,100 |  |
State |  |  |
Operating Loss Carryforwards [Line Items] |  |  |
Net operating loss ("NOL") carryforwards | 232,100 | $ 232,100 | $ 166,800
Federal and state tax credits | $ 600 |  |

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