CASH, CASH EQUIVALENTS AND SHORT TERM INVESTMENTS (Tables)

6 Months Ended

Jun. 30, 2019

Cash and Cash Equivalents [Abstract]

Summary of securities included in cash and cash equivalents and short term investments

Securities classified as cash and cash equivalents and short-term investments as of June 30, 2019 and December 31, 2018 are summarized below (in thousands). Estimated fair value is based on quoted market prices for these investments.

June 30, 2019	Amortized Cost		Fair Value
Cash and cash equivalents
Cash	$	59,986	$	59,986
Commercial paper	8,239		8,239
Money market funds	123		123
Total cash and cash equivalents	68,348		68,348
Short-term investments
Commercial paper and Corporate and Government debt securities with maturities less than 1 year	$	7,114	$	7,114
Total short-term investments	$	7,114	$	7,114
Total	$	75,462	$	75,462

December 31, 2018	Amortized Cost		Fair Value
Cash and cash equivalents
Cash	$	95,660	$	95,660
Commercial paper	14,028		14,028
Agency bond	1,250		1,250
Money market funds	11		11
Total cash and cash equivalents	$	110,949	$	110,949