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Common Stock and Stock-Based Compensation - Summary of Stock Options under Employee Equity Incentive Plan and Stock Option Plan for Non-Employee Directors (Detail)
$ / shares in Units, $ in Thousands
 9 Months Ended
Sep. 25, 2021
USD ($)
$ / shares
shares
Shares  
Outstanding at beginning of period | shares 241,847
Granted | shares 20,420
Exercised | shares (32,835)
Outstanding at end of period | shares 229,432
Exercisable at end of period | shares 81,317
Vested and expected to vest at end of period | shares 210,177
Weighted-Average Exercise Price  
Outstanding at beginning of period | $ / shares $ 228.58
Granted | $ / shares 1,031.01
Exercised | $ / shares 197.25
Outstanding at end of period | $ / shares 304.49
Exercisable at end of period | $ / shares 228.58
Vested and expected to vest at end of period | $ / shares $ 300.67
Weighted-Average Remaining Contractual Term  
Outstanding at end of period 5 years 8 months 4 days
Exercisable at end of period 4 years 9 months 25 days
Vested and expected to vest at end of period 5 years 7 months 20 days
Outstanding at end of period | $ $ 59,372
Exercisable at end of period | $ 24,398
Vested and expected to vest at end of period | $ $ 54,825