Investments (Tables)

9 Months Ended

Sep. 24, 2022

Amortized Cost and Fair Value of Available-for-Sale Investments

The amortized cost and fair values of available-for-sale investments are as follows at September 24, 2022 and December 25, 2021 (in thousands):    

			Gross		Gross
	Amortized Cost		Unrealized Gains		Unrealized Losses		Fair Value
September 24, 2022
Money market investments	$	22,062	$	—	$	—	$	22,062
Asset-backed securities		19,742		—		2,666		17,076
Corporate bonds and direct obligations of government agencies		129,250		—		8,536		120,714
U.S. Treasury obligations		2,344		—		102		2,242
Total	$	173,398	$	—	$	11,304	$	162,094
December 25, 2021
Money market investments	$	8,750	$	—	$	—	$	8,750
Asset-backed securities		22,441		—		346		22,095
Corporate bonds and direct obligations of government agencies		137,916		1,406		966		138,356
U.S. Treasury obligations		2,342		50		—		2,392
Total	$	171,449	$	1,456	$	1,312	$	171,593

Schedule of Unrealized Loss on Available-for-Sale Investments

For those available-for-sale investments with unrealized losses at September 24, 2022 and December 25, 2021, the following table summarizes the duration of the unrealized loss (in thousands):

	Less than 12 months				12 months or longer						Total
	Fair Value		Unrealized Loss		Fair Value		Unrealized Loss		Fair Value		Unrealized Loss
September 24, 2022
Asset-backed securities	$	3,224	$	453	$	13,852	$	2,213	$	17,076	$	2,666
Corporate bonds and direct obligations of government agencies		68,854		2,732		51,860		5,804		120,714		8,536
U.S. Treasury obligations		2,242		102		—		—		2,242		102
Total	$	74,320	$	3,287	$	65,712	$	8,017	$	140,032	$	11,304
December 25, 2021
Asset-backed securities	$	22,095	$	346	$	—	$	—	$	22,095	$	346
Corporate bonds and direct obligations of government agencies		72,526		966		—		—		72,526		966
Total	$	94,621	$	1,312	$	—	$	—	$	94,621	$	1,312