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Liquidity and Management's Plans (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014	Mar. 31, 2014	Dec. 31, 2013
Liquidity and management's plans [Abstract]
Cash and cash equivalents	$ 38,696	$ 46,582	$ 43,019	$ 44,078
Total current assets	82,286us-gaap_AssetsCurrent	85,677us-gaap_AssetsCurrent
Total current liabilities	$ 18,460us-gaap_LiabilitiesCurrent	$ 18,404us-gaap_LiabilitiesCurrent

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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