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Changes in Redeemable Common Stock (Details) (USD $)
In Thousands
Redeemable Common Stock Shares
Redeemable Common Stock Amount
USD ($)
Balance at May. 31, 2014 50fil_Balance
/ us-gaap_StatementEquityComponentsAxis
= fil_RedeemableCommonStockSharesMember		 275fil_Balance
/ us-gaap_StatementEquityComponentsAxis
= fil_RedeemableCommonStockAmountMember
Issuance of redeemable common stock (Shares) 170fil_IssuanceOfRedeemableCommonStockShares
/ us-gaap_StatementEquityComponentsAxis
= fil_RedeemableCommonStockSharesMember		  
Issuance of redeemable common stock (Amount)   $ 850fil_IssuanceOfRedeemableCommonStockAmount
/ us-gaap_StatementEquityComponentsAxis
= fil_RedeemableCommonStockAmountMember
Accretion of redeemable common stock   $ 340fil_AccretionOfRedeemableCommonStock1
/ us-gaap_StatementEquityComponentsAxis
= fil_RedeemableCommonStockAmountMember
Repurchase of redeemable common stock (50)fil_RepurchaseOfRedeemableCommonStock
/ us-gaap_StatementEquityComponentsAxis
= fil_RedeemableCommonStockSharesMember		 (275)fil_RepurchaseOfRedeemableCommonStock
/ us-gaap_StatementEquityComponentsAxis
= fil_RedeemableCommonStockAmountMember
Balance at Feb. 28, 2015 170fil_Balance
/ us-gaap_StatementEquityComponentsAxis
= fil_RedeemableCommonStockSharesMember		 1,190fil_Balance
/ us-gaap_StatementEquityComponentsAxis
= fil_RedeemableCommonStockAmountMember