FAIR VALUE MEASUREMENTS (Tables)

12 Months Ended

Dec. 26, 2018

Fair Value Disclosures [Abstract]

Schedule of Cash and Cash Equivalents

The following tables summarize our cash, cash equivalents and marketable securities by significant investment categories as of December 26, 2018 and December 27, 2017:

		December 26, 2018
		Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Cash and Cash Equivalents		Marketable Securities
Cash		$	19,746	$	—	$	—		$	19,746	$	19,746	$	—
Level 1:
	Money market funds	5,004		—		—			5,004		5,004		—
	Mutual funds	62,235		—		(122		)	62,113		—		62,113
Level 2:
	Corporate debt securities(1)	—		—		—			—		—		—
Total		$	86,985	$	—	$	(122	)	$	86,863	$	24,750	$	62,113

		December 27, 2017
		Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value		Cash and Cash Equivalents		Marketable Securities
Cash		$	16,138	$	—	$	—		$	16,138	$	16,138	$	—
Level 1:
	Money market funds	5,369		—		—			5,369		5,369		—
	Mutual funds	60,985		—		(61		)	60,924		—		60,924
Level 2:
	Corporate debt securities(1)	2,125		2		(15		)	2,112		—		2,112
Total		$	84,617	$	2	$	(76	)	$	84,543	$	21,507	$	63,036

(1) Corporate debt securities were measured at fair value using a market approach utilizing observable prices for identical securities or securities with similar characteristics and inputs that are observable or can be corroborated by observable market data.

Schedule of Unrealized Loss on Investments

The following tables summarize the gross unrealized losses and fair values for investments in debt securities that were in an unrealized loss position as of December 26, 2018 and December 27, 2017, aggregated by length of time that individual securities have been in a continuous loss position:

	Less than 12 Months			12 Months or Greater			Total
	Fair Value	Unrealized Loss		Fair Value	Unrealized Loss		Fair Value	Unrealized Loss
As of December 26, 2018	—	—		—	—		—	—
As of December 27, 2017	1,675	(12	)	162	(3	)	1,837	(15	)

Schedule of Gain (Loss) on Investments

A summary of other income from available-for-sale securities recognized during fiscal 2018, 2017 and 2016 is as follows:

		2018			2017			2016
Available-for-sale securities:
	Dividend income	$	1,392		$	830		$	296
	Interest income	9			77			88
	Loss on investments	(3		)	(5		)	(7		)
	Unrealized loss on available-for-sale equity securities	(61		)	—			—
Total other income, net		$	1,337		$	902		$	377

Schedule of Realized Gain (Loss)

A summary of available-for-sale securities sold and gross realized gains and losses recognized during fiscal 2018, 2017 and 2016 is as follows:

		2018			2017			2016
Available-for-sale securities:
	Gross proceeds from sales and redemptions	$	2,144		$	2,223		$	938
	Cost basis of sales and redemptions	2,160			2,271			956
	Gross realized gains included in net income	2			1			2
	Gross realized losses included in net income	(18		)	(49		)	(20		)
	Amounts reclassified out of accumulated other comprehensive loss	16			47			19