4. Cash Equivalents and Marketable Securities

Cash equivalents are short-term, highly liquid investments with original or remaining maturity dates of three months or less at the date of acquisition. Cash equivalents are carried at cost plus accrued interest, which approximates fair market value. As of January 24, 2015 and July 31, 2014, aggregate cash and cash equivalents consisted of (in thousands):

January 24, 2015:


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Market Value
Cash and cash equivalents	$	11,358	$	—	$	—	$	11,358

Total	$	11,358	$	—	$	—	$	11,358

July 31, 2014:


	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Market Value
Cash and cash equivalents	$	12,241	$	—	$	—	$	12,241

Total	$	12,241	$	—	$	—	$	12,241