Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2016

Summary of Significant Accounting Policies [Abstract]

Schedule of Deferred Revenue

Activity under the August 2013 Contract Settlement was as follows:

Deferred Revenue, December 31, 2015	$	3,000
Payment received		2,500
Less: Amount amortized as revenue		(1,125	)
Deferred Revenue, September 30, 2016	$	4,375

Cash and Available-for-Sale Securities Adjusted Cost, Gross Unrealized Gains, Gross Unrealized Losses and Fair Value by Significant Investment Category

The following tables show the adjusted cost, gross unrealized gains, gross unrealized losses and fair value of our securities by significant investment category as of September 30, 2016 and December 31, 2015.

	September 30, 2016
	Adjusted Cost		Unrealized Gains		Unrealized Losses		Fair Value		Cash and Cash Equivalents		Investments Available for Sale
Cash	$	5,335	$	—	$	—	$	5,335	$	5,335	$	—
Level 1:
Mutual funds		3,192		—		—		3,192		3,192		—
U.S. government securities		1,803		2		—		1,805		—		1,805
U.S. agency securities		7,433		5		—		7,438		—		7,438
		12,428		7		—		12,435		3,192		9,243
Total	$	17,763	$	7	$	—	$	17,770	$	8,527	$	9,243

	December 31, 2015
	Adjusted Cost		Unrealized Gains		Unrealized Losses			Fair Value		Cash and Cash Equivalents		Investments Available for Sale
Cash	$	3,296	$	—	$	—		$	3,296	$	3,296	$	—
Level 1:
Mutual funds		5,005		—		—			5,005		5,005		—
U.S. government securities		1,806		—		(3	)		1,803		—		1,803
U.S. agency securities		8,579		1		(4	)		8,576		425		8,151
		15,390		1		(7	)		15,384		5,430		9,954
Total	$	18,686	$	1	$	(7	)	$	18,680	$	8,726	$	9,954