Investments (Tables)

12 Months Ended

Jan. 26, 2020

Investments [Abstract]

Summary of available-for-sale securities

The following table summarizes the values of the Company’s available-for-sale securities: 

	January 26, 2020						January 27, 2019
(in thousands)	Market Value		Adjusted Cost		Gross Unrealized Gain		Market Value		Adjusted Cost		Gross Unrealized Gain
Convertible debt	$	10,700	$	7,544	$	3,156	$	3,105	$	3,105	$	—
Total available-for-sale securities	$	10,700	$	7,544	$	3,156	$	3,105	$	3,105	$	—

Schedule of available-for-sale securities, classified by maturity period

The following table summarizes the maturities of the Company’s available-for-sale securities:

	January 26, 2020
(in thousands)	Market Value		Adjusted Cost
Within 1 year	$	10,200	$	7,044
After 1 year through 5 years	500		500
Total available-for-sale securities	$	10,700	$	7,544