Balance Sheet Details (Tables)

12 Months Ended

Dec. 31, 2015

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Available-for-Sale Securities Recorded at Fair Value with Unrealized Gains or Losses

Available-for-sale securities with contractual maturities of less than 12 months were as follows (in thousands):

	December 31, 2015							December 31, 2014
	Amortized cost basis		Gross unrealized loss			Fair value		Amortized cost basis		Gross unrealized loss			Fair value
Corporate bonds and notes	$	—	$	—		$	—	$	1,000	$	(1	)	$	999
Government securities/money market		4,080		(2	)		4,078		1,881		—			1,881
Total	$	4,080	$	(2	)	$	4,078	$	2,881	$	(1	)	$	2,880

Summary of Equipment and Improvements

Equipment and improvements consist of the following (in thousands):

	December 31,
	2015			2014
Computer hardware, software, and equipment	$	16,288		$	16,143
Leasehold improvements		5,170			5,170
Office furniture and fixtures		1,214			1,213
		22,672			22,526
Less accumulated depreciation and amortization		(20,180	)		(18,253	)
Equipment and improvements, net	$	2,492		$	4,273

Summary of Accrued Liabilities

Accrued liabilities consist of the following (in thousands):

	December 31,
	2015		2014
Salaries and benefits	$	2,723	$	2,779
Restructuring		442		912
Pennsylvania grant liability		1,000		1,000
Royalties and revenue sharing		643		835
Income taxes		205		160
Marketing expenses, rebates, and other		51		66
Total accrued liabilities	$	5,064	$	5,752

Deferred Rent and Other Long Term Liabilities

Deferred rent and other long-term liabilities consist of the following (in thousands):

	December 31,
	2015		2014
Deferred rent	$	1,402	$	1,643
Restructuring - beyond one year		1,767		1,977
Sublease deposits		66		23
Total deferred rent and other long-term liabilities	$	3,235	$	3,643