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

3 Months Ended

Mar. 31, 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:

	March 31, 2018		December 31, 2017
Cash and cash equivalents	$	36,067	$	26,584
Restricted cash		635		629
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	$	36,702	$	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:

	March 31, 2017		December 31, 2016
Cash and cash equivalents	$	21,472	$	24,289
Restricted cash		605		602
Total cash, cash equivalents and restricted cash shown in the condensed consolidated statements of cash flows	$	22,077	$	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
March 31, 2018
Cash and cash equivalents:
Cash	$	1,908	$	-	$	-		$	1,908
Money market funds		25,923		-		-			25,923
U.S. treasuries		4,000		-		-			4,000
Corporate debt securities		4,236		-		-			4,236
Total cash and cash equivalents		36,067		-		-			36,067
Marketable securities available-for-sale:
U.S. treasuries		45,218		-		(12	)		45,206
U.S. government agency securities		54,665		1		(22	)		54,644
Corporate debt securities		114,931		5		(73	)		114,863
Total marketable securities available-for-sale		214,814		6		(107	)		214,713
Total cash, cash equivalents and marketable securities	$	250,881	$	6	$	(107	)	$	250,780
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):

	March 31, 2018
	Amortized Cost		Estimated Fair Value
Mature in one year or less	$	188,963	$	188,869
Mature after one year through two years		25,851		25,844
	$	214,814	$	214,713

- 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 + Details