Fair Value of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2015

Schedule of fair value of the financial assets and liabilities

In accordance with the fair value hierarchy described above, the following tables show the fair value of the Company's financial assets and liabilities that are required to be measured at fair value, in thousands:

	Fair Value Measurements at December 31, 2015
	Total Carrying Value at December 31, 2015		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents	$	34,152	$	34,152	$	—	$	—
Marketable securities		28,038		—		28,038		—
Long term marketable securities		55,009		—		55,009		—
Marketable securities—restricted (SERP)		263		—		263		—

Total assets at fair value	$	117,462	$	34,152	$	83,310	$	—


Liabilities:

Derivative liabilities	$	854	$	—	$	—	$	854

	Fair Value Measurements at December 31, 2014
	Total Carrying Value at December 31, 2014		Quoted Prices in Active Markets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)
Assets:
Cash and cash equivalents	$	36,396	$	36,396	$	—	$	—
Marketable securities		37,940		—		37,940		—
Long term marketable securities		19,816		—		19,816		—
Marketable securities—restricted (SERP)		305		—		305		—

Total assets at fair value	$	94,457	$	36,396	$	58,061	$	—


Liabilities:

Derivative liabilities	$	6,564	$	—	$	—	$	6,564

Schedule of assumptions used to calculate fair value of make-whole liability

Volatility		45%
Stock Price as of December 31, 2015		$13.44 per share
Credit Spread		2363 bps
Term		1.33 years
Dividend Yield		0.0%

Schedule of Level 3 liabilities included in Non-current Liabilities on the Balance Sheet

The following table presents information about the Company's Level 3 liabilities as of December 31, 2014 and December 31, 2015 that are included in the Non-Current Liabilities section of the Consolidated Balance Sheets, in thousands:

	Year Ended December 31, 2014 and 2015
Balance at December 31, 2013	$	12,644
Changes in fair value of derivative liabilities included in earnings		(2,809	)
Reduction due to conversion of debt to equity		(3,271	)

Balance at December 31, 2014		6,564

Changes in fair value of derivative liabilities included in earnings		(193	)
Reduction due to conversion of debt to equity		(4,865	)
Cashless exercise of common stock warrants		(652	)

Balance at December 31, 2015	$	854

Schedule of unrestricted marketable securities

Unrestricted marketable securities held by the Company were as follows, in thousands:

At December 31, 2015:

Available for Sale		Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
Corporate debt securities		$	83,535			5			(493	)	$	83,047

At December 31, 2014:

Available for Sale		Amortized Cost			Gross Unrealized Gains			Gross Unrealized Losses			Fair Value
Corporate debt securities		$	57,910			4			(158	)	$	57,756

Schedule of contractual maturities of the unrestricted marketable securities held

The contractual maturities of the unrestricted available for sale marketable securities held by the Company were as follows, in thousands:

	December 31, 2015
Less Than 1 Year	$	28,038
1 - 5 years		55,009
Greater Than 5 Years		—

Total	$	83,047