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Investments (Tables)

6 Months Ended

Jun. 30, 2018

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 June 30, 2018 and December 30, 2017 (in thousands):

		Amortized Cost				Gross Unrealized Gains				Gross Unrealized Losses				Fair Value
June 30, 2018
Money market investments		$	16,912			$	—			$	—			$	16,912
Asset-backed securities			1,206				—				7				1,199
Corporate bonds and direct obligations of government agencies			94,101				11				1,312				92,800
Total		$	112,219			$	11			$	1,319			$	110,911
December 30, 2017
Money market investments		$	27,895			$	—			$	—			$	27,895
Asset-backed securities			2,805				—				5				2,800
Corporate bonds and direct obligations of government agencies			80,442				117				335				80,224
Total		$	111,142			$	117			$	340			$	110,919

Schedule of Unrealized Loss on Available-for-Sale Investments

For those available-for-sale investments with unrealized losses at June 30, 2018 and December 30, 2017, 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
June 30, 2018
Asset-backed securities		$	1,199			$	7			$	—			$	—			$	1,199			$	7
Corporate bonds and direct obligations of government agencies			79,404				1,137				8,640				175				88,044				1,312
Total		$	80,603			$	1,144			$	8,640			$	175			$	89,243			$	1,319
December 30, 2017
Asset-backed securities		$	1,864			$	4			$	632			$	1			$	2,496			$	5
Corporate bonds and direct obligations of government agencies			41,322				220				14,016				115				55,338				335
Total		$	43,186			$	224			$	14,648			$	116			$	57,834			$	340

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- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References

No definition available.

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X

- Definition

For all investments in an unrealized loss position, including those for which other-than-temporary impairments have not been recognized in earnings (including investments for which a portion of an other-than-temporary impairment has been recognized in other comprehensive income), a tabular disclosure of the aggregate related fair value of investments with unrealized losses and the aggregate amount of unrealized losses (that is, the amount by which amortized cost basis exceeds fair value).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563

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