CASH, CASH EQUIVALENTS, AND INVESTMENTS

The following table summarizes the fair value of our cash and investments held in our portfolio, recorded as cash and cash equivalents or short-term or long-term investments as of March 31, 2015, and December 31, 2014 (in thousands):



	March 31, 2015		December 31, 2014
Cash	$	24,213	$	16,506
Commercial paper and money market accounts	42,573		51,083
Total cash and cash equivalents	$	66,786	$	67,589

Corporate bonds	$	33,307	$	9,432
Certificates of deposit and time deposits	1,003		1,002
Total short-term investments	$	34,310	$	10,434

Corporate bonds	$	11,546	$	11,856
Total long-term investments	$	11,546	$	11,856

Total cash, cash equivalents, and investments	$	112,642	$	89,879

The following tables summarize the cost basis, unrealized gains and losses, and fair value of our available-for-sale investments held in our portfolio as of March 31, 2015, and December 31, 2014 (in thousands):



	March 31, 2015
			Unrealized
	Cost Basis		Gain		Loss			Fair Value
Corporate bonds	$	44,884	$	12	$	(43	)	$	44,853
Certificates of deposit and time deposits	1,003		—		—			1,003
Total available-for-sale securities	$	45,887	$	12	$	(43	)	$	45,856



	December 31, 2014
			Unrealized
	Cost Basis		Gain		Loss			Fair Value
Corporate bonds	$	21,335	$	1	$	(48	)	$	21,288
Certificates of deposit and time deposits	1,002		—		—			1,002
Total available-for-sale securities	$	22,337	$	1	$	(48	)	$	22,290