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Equity Incentive Plan (Details) - BFLY Operations Inc - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Term of stock options | 10 years |
Cash proceeds from the exercise of stock options | $ 2,038 | $ 324
Option awards issued | 3,270,000 |
Number of options that were modified to increase the post-employment exercise period | 705,883 |
Unrecognized stock-based compensation expense | $ 10,000 |
Tax benefits of the stock-based compensation expense | 0 | 0
Tax benefits from the exercise of stock options | 0 | 0
Unrecognized stock-based compensation expense | $ 33,100 | $ 10,600
Remaining weighted average vesting period | 3 years 6 months | 3 years 6 months
Restricted stock units |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Restricted stock units granted | 1,825,000 |
Unrecognized stock-based compensation expense | $ 17,800 |
Restricted stock units | Non-employees |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Restricted stock units granted | 1,000,000 |
Plan | Options |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Increase in Common Stock reserved for issuance | 13,506,938 |
Common Stock reserved for issuance | 33,506,938 |
Common shares remain available for issuance | 204,090 |
Term of stock options | 10 years |
Cash proceeds from the exercise of stock options | $ 2,000 | $ 300
Total intrinsic value of the stock options exercised | $ 3,600 | $ 500
Weighted-average grant date fair value of options granted | $ 3.27 | $ 2.31

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