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Merger Agreement - Narrative (Details) $ / shares in Units, $ in Thousands | Jul. 14, 2021 USD ($) $ / shares shares | Sep. 25, 2021 $ / shares shares | Dec. 26, 2020 shares | Sep. 26, 2020 shares | Jun. 27, 2020 shares | Mar. 28, 2020 shares | Dec. 28, 2019 shares
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Schedule Of Reverse Recapitalization [Line Items] |  |  |  |  |  |  |
Common stock converted (in shares) | 91,220,901 |  |  |  |  |  |
Stock issued (in shares) | 37,500,000 |  |  |  |  |  |
Stock price (in usd per share) | $ / shares | $ 10.00 |  |  |  |  |  |
PIPE investment proceeds | $ | $ 375,000 |  |  |  |  |  |
Transaction costs | $ | $ 36,140 |  |  |  |  |  |
Warrants, exercise price (in usd per share) | $ / shares |  | $ 11.50 |  |  |  |  |
Exchange ratio | 164.83 |  |  |  |  |  |
Common stock, outstanding (in shares) | 187,392,901 | 187,481,206 | 90,934,930 | 89,726,225 | 89,637,920 | 89,637,920 | 89,549,615
Old Hillman shareholders |  |  |  |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |  |  |  |
Common stock, outstanding (in shares) | 553,439 |  |  |  |  |  |
Public shareholders |  |  |  |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |  |  |  |
Shares issued (in shares) | 50,000,000 |  |  |  |  |  |
SPAC sponsors |  |  |  |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |  |  |  |
Shares issued (in shares) | 8,672,000 |  |  |  |  |  |
Public Warrants |  |  |  |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |  |  |  |
Warrants, common stock issuable (in shares) | 16,666,628 |  |  |  |  |  |
Warrants, exercise price (in usd per share) | $ / shares |  | $ 11.50 |  |  |  |  |
Private Placement Warrants |  |  |  |  |  |  |
Schedule Of Reverse Recapitalization [Line Items] |  |  |  |  |  |  |
Warrants, common stock issuable (in shares) | 8,000,000 |  |  |  |  |  |
Warrants, exercise price (in usd per share) | $ / shares |  | $ 11.50 |  |  |  |  |

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