Cash, Cash Equivalents, Restricted Cash and Marketable Securities (Tables)

3 Months Ended

Mar. 31, 2019

Cash Cash Equivalents And Short Term Investments [Abstract]

Reconciliation of Cash, Cash Equivalents and Restricted Cash

The following table provides a reconciliation of cash, cash equivalents and restricted cash reported within the condensed consolidated balance sheet that sum to the total of the same amounts shown in the condensed consolidated statements of cash flows:

	March 31, 2019		December 31, 2018		March 31, 2018		December 31, 2017
Cash and cash equivalents	$	112,133	$	49,348	$	36,067	$	26,584
Restricted cash		615		619		635		629
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	$	112,748	$	49,967	$	36,702	$	27,213

Summary of Cash, Cash Equivalents and Marketable Securities

Cash, cash equivalents and marketable securities consist of the following (in thousands):

	Amortized Cost		Unrealized Gains		Unrealized Losses			Estimated Fair Value
March 31, 2019
Cash and cash equivalents:
Cash	$	1,518	$	-	$	-		$	1,518
Money market funds		102,616		-		-			102,616
U.S. treasuries		5,000		-		-			5,000
Corporate debt securities		2,999		-		-			2,999
Total cash and cash equivalents		112,133		-		-			112,133
Marketable securities available-for-sale:
U.S. treasuries		1,999		-		-			1,999
U.S. government agency securities		26,085		-		(8	)		26,077
Corporate debt securities		42,999		10		(2	)		43,007
Total marketable securities available-for-sale		71,083		10		(10	)		71,083
Total cash, cash equivalents and marketable securities	$	183,216	$	10	$	(10	)	$	183,216
December 31, 2018
Cash and cash equivalents:
Cash	$	3,147	$	-	$	-		$	3,147
Money market funds		44,002		-		-			44,002
Corporate debt securities		2,199		-		-			2,199
Total cash and cash equivalents		49,348		-		-			49,348
Marketable securities available-for-sale:
U.S. treasuries		14,732		-		(8	)		14,724
U.S. government agency securities		42,416		-		(44	)		42,372
Corporate debt securities		39,108		-		(16	)		39,092
Total marketable securities available-for-sale		96,256		-		(68	)		96,188
Total cash, cash equivalents and marketable securities	$	145,604	$	-	$	(68	)	$	145,536

Maturities of Marketable Securities Available-for-Sale

The maturities of our marketable securities available-for-sale are as follows (in thousands):

	March 31, 2019
	Amortized Cost		Estimated Fair Value
Mature in one year or less	$	71,083	$	71,083
Mature after one year through two years		-		-
	$	71,083	$	71,083