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

9 Months Ended

Sep. 30, 2018

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:

	September 30, 2018		December 31, 2017
Cash and cash equivalents	$	38,712	$	26,584
Restricted cash		622		629
Total cash, cash equivalents and restricted cash shown in the condensed consolidated   statements of cash flows	$	39,334	$	27,213

Due to the adoption of ASU 2016-18, we have presented below, comparable prior period cash, cash equivalents and restricted cash balances as presented in the condensed consolidated statement of cash flows:

	September 30, 2017		December 31, 2016
Cash and cash equivalents	$	20,096	$	24,289
Restricted cash		626		602
Total cash, cash equivalents and restricted cash shown in the condensed consolidated   statements of cash flows	$	20,722	$	24,891

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
September 30, 2018
Cash and cash equivalents:
Cash	$	4,515	$	-	$	-		$	4,515
Money market funds		22,697		-		-			22,697
U.S. treasuries		11,500		-		-			11,500
Total cash and cash equivalents		38,712		-		-			38,712
Marketable securities available-for-sale:
U.S. treasuries		25,694		-		(18	)		25,676
U.S. government agency securities		45,329		-		(70	)		45,259
Corporate debt securities		70,580		2		(8	)		70,574
Total marketable securities available-for-sale		141,603		2		(96	)		141,509
Total cash, cash equivalents and marketable securities	$	180,315	$	2	$	(96	)	$	180,221
December 31, 2017
Cash and cash equivalents:
Cash	$	4,041	$	-	$	-		$	4,041
Money market funds		22,543		-		-			22,543
Total cash and cash equivalents		26,584		-		-			26,584
Marketable securities available-for-sale:
U.S. treasuries		45,559		-		(25	)		45,534
U.S. government agency securities		86,860		-		(40	)		86,820
Corporate debt securities		32,931		-		(15	)		32,916
Total marketable securities available-for-sale		165,350		-		(80	)		165,270
Total cash, cash equivalents and marketable securities	$	191,934	$	-	$	(80	)	$	191,854

Maturities of Marketable Securities Available-for-Sale

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

	September 30, 2018
	Amortized Cost		Estimated Fair Value
Mature in one year or less	$	141,603	$	141,509
Mature after one year through two years		-		-
	$	141,603	$	141,509