XML 20 R22.htm IDEA: XBRL DOCUMENT v2.4.1.9
Investment in Marketable Securities and Fair Value of Financial Instruments (Details) (United States Treasury Notes, USD $)
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
United States Treasury Notes
    
Cash and Cash Equivalents [Line Items]    
United States Treasury Notes , Cost $ 9,969us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_USTreasurySecuritiesMember		 $ 9,969us-gaap_AvailableForSaleEquitySecuritiesAmortizedCostBasis
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_USTreasurySecuritiesMember
United States Treasury Notes, Fair Value 10,001us-gaap_AvailableForSaleSecuritiesDebtSecurities
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_USTreasurySecuritiesMember		 9,998us-gaap_AvailableForSaleSecuritiesDebtSecurities
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_USTreasurySecuritiesMember
United States Treasury Notes, Unrealized Gain $ 32us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_USTreasurySecuritiesMember		 [1] $ 29us-gaap_AvailableForSaleSecuritiesGrossUnrealizedGains
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_USTreasurySecuritiesMember		 [1]
[1] Included in other comprehensive income.