Fair Value (Tables)

3 Months Ended

Mar. 31, 2014

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Schedule of Assumptions for Fair Value

Fair value at March 31, 2014, was estimated using the following assumptions:

Underlying price per share	$0.19 - $0.27
Exercise price per share	$1.31 - $1.65
Risk-free interest rate	0.06% - 0.23%
Expected holding period	0.38 - 1.64 yrs.
Expected volatility	69.74% - 113.56%
Expected dividend yield	None

Schedule of fair value, assets and liabilities measured on recurring basis

The table below presents the balances of assets and liabilities measured at fair value on a recurring basis by level within the hierarchy as of March 31, 2014:

	(in thousands)
	Total			Level 1		Level 2		Level 3
Assets:
Marketable Securities-unrestricted	$	17,449		$	17,449	$	—	$	—
Liabilities:
Warrants	$	(14	)	$	—	$	—	$	(14	)

Fair Value, Inputs, Level 3 [Member]

Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]

Fair value, liabilities measured on recurring basis

The changes in Level 3 Liabilities measured at fair value on a recurring basis are summarized as follows:

	Fair Value of Redeemable Warrants
	(in thousands)
	2014		2013
Balance at January 1	$	14	$	295
Fair value adjustment at March 31	—		(89		)
Balance at March 31	$	14	$	206