Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements (Details)

Fair Value Measurements (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Assets:
Marketable securities	$ 993us-gaap_MarketableSecuritiesCurrent	$ 1,975us-gaap_MarketableSecuritiesCurrent
Total assets	993us-gaap_AssetsFairValueDisclosure	1,975us-gaap_AssetsFairValueDisclosure
Liabilities:
Warrants potentially settleable in cash	13,456us-gaap_DerivativeLiabilitiesCurrent	8,464us-gaap_DerivativeLiabilitiesCurrent
Total liabilities	13,456	8,464
Quoted Prices in Active Markets (Level 1) [Member]
Assets:
Marketable securities
Total assets
Liabilities:
Warrants potentially settleable in cash
Total liabilities
Significant Other Observable Inputs (Level 2) [Member]
Assets:
Marketable securities	993	1,975
Total assets	993	1,975
Liabilities:
Warrants potentially settleable in cash
Total liabilities
Unobservable Inputs (Level 3) [Member]
Assets:
Marketable securities
Total assets
Liabilities:
Warrants potentially settleable in cash	13,456	8,464
Total liabilities	$ 13,456	$ 8,464

- Definition

Fair value, after the effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset, expected to be settled within one year or normal operating cycle, if longer. Includes assets not subject to a master netting arrangement and not elected to be offset.

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