Convertible Redeemable Preferred Stock and Stockholders' Equity (Deficit) (Details)										3 Months Ended
	Dec. 29, 2025 USD ($) $ / shares shares	Sep. 26, 2025 shares	Jun. 24, 2025	Jul. 24, 2024 USD ($) $ / shares shares	Jul. 23, 2024 USD ($)	Jun. 27, 2024	Dec. 26, 2023	Jun. 15, 2023	Mar. 10, 2021 USD ($) shares	Mar. 31, 2026 USD ($) shares	Mar. 31, 2025 USD ($)	Dec. 31, 2025 shares	Dec. 28, 2025 shares
Share-based Compensation Arrangement by Share-based Payment Award
Convertible redeemable preferred stock, net of issuance costs (in shares) | shares				13,257,294
Deferred dividend rate (percent)			0.095
Accrued dividends				$ 32,800,000
Preferred stock, special dividend threshold					$ 100,000,000.0					$ 47,000,000.0
Liquidation preference				$ 32,800,000
Stock exchange agreement, one-time cash payment to preferred stockholders	$ 2,000,000.0									$ 6,000,000.0
Convertible redeemable preferred stock, shares authorized (in shares) | shares	60,000,000												121,750,000
Preferred stock, shares authorized (in shares) | shares	14,000,000									1,329,137		1,329,137	105,000,000
Common stock, shares authorized (in shares) | shares	46,000,000									46,000,000		46,000,000	16,750,000
Payment of preferred stock and common stock issuance costs										$ 907,000	$ 0
Common Stock
Share-based Compensation Arrangement by Share-based Payment Award
Stock exchange agreement, new stock received (in shares) | shares	3,286,825	3,286,825
Share price | $ / shares	$ 8.19
Recapitalization transaction (in shares) | shares	9,860,475
Payment of preferred stock and common stock issuance costs	$ 1,000,000.0
Recapitalization transaction, net of issuance costs	9,900
Accumulated Deficit
Share-based Compensation Arrangement by Share-based Payment Award
Recapitalization transaction, net of issuance costs	$ 73,000,000.0
Series B Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award
Convertible redeemable preferred stock, net of issuance costs (in shares) | shares				13,257,294
Dividend rate (percent)				7.50%					7.50%
Preferred stock cumulative dividend rate (percent)										9.50%
Deferred dividend rate (percent)			0.095			0.095	0.095	0.095
Accrued dividends				$ 32,800,000
Preferred stock, convertible, shares issuable (in shares) | shares				662,862
Preferred stock, convertible, conversion price (in dollars per share) | $ / shares				$ 49.438
Preferred stock, special dividend threshold				$ 47,000,000.0	$ 100,000,000.0
Liquidation preference				$ 32,800,000
Fair value net of issuance cost										$ 19,600,000
Convertible redeemable preferred stock, net of issuance costs										$ 13,000,000.0
Stock exchange agreement, shares exchanged (in shares) | shares	31,928,301	31,928,301
Convertible redeemable preferred stock, aggregate liquidation preference	$ 264,500,000
Payment of preferred stock and common stock issuance costs	16,300,000
Temporary equity, carrying amount, derecognized	207,500,000
Accrued dividends liability derecognized	$ 27,700,000
Series B Preferred Stock | Private Placement
Share-based Compensation Arrangement by Share-based Payment Award
Convertible redeemable preferred stock, net of issuance costs (in shares) | shares									82,527,609
Gross proceeds									$ 204,000,000.0
Convertible redeemable preferred stock, net of issuance costs									$ 187,900,000
Series C Preferred Stock
Share-based Compensation Arrangement by Share-based Payment Award
Stock exchange agreement, new stock received (in shares) | shares	4,223,621	4,223,621
Share price | $ / shares	$ 14.50
Temporary equity, recapitalization transaction (in shares) | shares	12,670,863
Convertible redeemable preferred stock, shares authorized (in shares) | shares										12,670,863		12,670,863
Payment of preferred stock and common stock issuance costs	$ 1,400,000
Maximum ownership after conversion (in percent)	49.99%
Conversion ratio (in shares)										1
Shares converted (in shares) | shares										0
Series B Convertible Redeemable Preferred Stock, Exchanges For Temporary Equity
Share-based Compensation Arrangement by Share-based Payment Award
Temporary equity, liquidation preference, exchanged	$ 183,700,000
Series B Convertible Redeemable Preferred Stock, Exchanged For Common Equity
Share-based Compensation Arrangement by Share-based Payment Award
Temporary equity, liquidation preference, exchanged	$ 80,800,000