Cash, Cash Equivalents and Investments (Tables)

3 Months Ended

Mar. 31, 2018

Cash And Cash Equivalents [Abstract]

Cash and Cash Equivalents and Investments

The Company’s cash and investments consisted of the following:

	March 31,		December 31,
	2018		2017
Cash	$	3,146	$	3,785
Cash equivalents		9,306		1,774
Short-term investments		22,285		32,499
Total	$	34,737	$	38,058

Cash Equivalents and Investments Measured at Fair Value

Cash equivalents and investments measured at fair value were as follows at March 31, 2018 and December 31, 2017:

	March 31, 2018								December 31, 2017
	Level 1		Level 2		Level 3		Total		Level 1		Level 2		Level 3		Total
Cash equivalents:
Corporate bonds	$	0	$	5,594	$	0	$	5,594	$	0	$	1,347	$	0	$	1,347
US government agency bonds		0		1,699		0		1,699		0		250		0		250
Certificates of deposit		1,906		0		0		1,906		0		0		0		0
Money market funds		101		0		0		101		175		0		0		175
Investments:
Corporate bonds		0		9,452		0		9,452		0		18,433		0		18,433
Pre-refunded municipal bonds		0		0		0		0		0		2,132		0		2,132
US government agency bonds		0		4,340		0		4,340		0		4,455		0		4,455
Certificates of deposit		8,463		0		0		8,463		7,447		0		0		7,447
Total	$	10,470	$	21,085	$	0	$	31,555	$	7,622	$	26,617	$	0	$	34,239