CASH, CASH EQUIVALENTS, AND INVESTMENTS (Tables)

3 Months Ended

Mar. 31, 2015

Cash, Cash Equivalents, and Investments Disclosure [Abstract]

Summary of 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

Schedule of Available-for-Sale Investments

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