Fair Value (Tables)

6 Months Ended

Jun. 30, 2015

Fair Value Disclosures [Abstract]

Schedule of Assumptions for Fair Value as of Balance Sheet Date of Assets or Liabilities that relate to Transferor's Continuing Involvement

Fair value at June 30, 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 June 30, 2015:

	(in thousands)
	Total		Level 1		Level 2		Level 3
Assets:
Marketable Securities-unrestricted	$	13,872	$	13,872	$	—	$	—

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)
	2015		2014
Balance at January 1	$	—	$	14
Fair value adjustment at March 31	—		—
Balance at March 31	$	—	$	14
Fair value adjustment at June 30	—		$	(1	)
Balance at June 30	$	—	$	13