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

6 Months Ended

Jun. 30, 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:

	June 30, 2019		December 31, 2018		June 30, 2018		December 31, 2017
Cash and cash equivalents	$	34,225	$	49,348	$	28,726	$	26,584
Restricted cash		628		619		624		629
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	$	34,853	$	49,967	$	29,350	$	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
June 30, 2019
Cash and cash equivalents:
Cash	$	2,384	$	-	$	-		$	2,384
Money market funds		29,343		-		-			29,343
U.S. treasuries		500		-		-			500
Corporate debt securities		1,998		-		-			1,998
Total cash and cash equivalents		34,225		-		-			34,225
Marketable securities available-for-sale:
U.S. treasuries		1,493		1		-			1,494
U.S. government agency securities		26,874		29		-			26,903
Corporate debt securities		77,794		78		-			77,872
Total marketable securities available-for-sale		106,161		108		-			106,269
Total cash, cash equivalents and marketable securities	$	140,386	$	108	$	-		$	140,494
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):

	June 30, 2019
	Amortized Cost		Estimated Fair Value
Mature in one year or less	$	106,161	$	106,269
Mature after one year through two years		-		-
	$	106,161	$	106,269