Supplementary Financial Information (Tables)

3 Months Ended

Mar. 31, 2015

Other Financial Information [Abstract]

Marketable Securities

Marketable Securities, Available-for-sale (in thousands):

	March 31, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. treasury securities	$	30,049	$	—	$	(23	)	$	30,026
Certificates of deposit	49		—		—			49
Mutual funds	277		266		—			543
Total marketable securities	$	30,375	$	266	$	(23	)	$	30,618

	December 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Estimated Fair Value
U.S. treasury securities	$	30,049	$	—	$	(29	)	$	30,020
Certificates of deposit	48		—		—			48
Mutual funds	277		243		—			520
Total marketable securities	$	30,374	$	243	$	(29	)	$	30,588

Other Assets

Other Current Assets and Prepaid Expenses (in thousands):

	March 31, 2015		December 31, 2014
Pooled patents agreement receivable	$	—	$	6,000
Other	5,446		6,112
Total	$	5,446	$	12,112

Inventories

Inventories (in thousands):

	March 31, 2015		December 31, 2014
Raw materials	$	4,433	$	6,165
Work in process	346		351
Total	$	4,779	$	6,516

Accrued Expenses

Accrued Expenses (in thousands):

	March 31, 2015		December 31, 2014
Accrued royalties, licenses, and collaboration payments	$	5,772	$	7,223
Accrued compensation and related taxes	5,841		7,606
Accrued professional fees and consulting	2,017		1,872
Other	1,673		5,454
Total	$	15,303	$	22,155