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Treasury Stock	3 Months Ended
	Oct. 31, 2011
Treasury Stock [Abstract]
Treasury Stock	7. Treasury Stock The Company entered into a Repurchase Agreement, dated as of August 12, 2011 (the "Repurchase Agreement"), to purchase shares of its common stock from the Estate of Wade F. B. Thompson (the "Estate") in a private transaction. Pursuant to the terms of the Repurchase Agreement, on August 15, 2011, the Company purchased from the Estate 1,000,000 shares of its common stock at a price of $20.00 per share, and held them as treasury stock, representing an aggregate purchase price of $20,000. The closing price of Thor common stock on August 12, 2011 was $20.62. The Estate holds shares of common stock of the Company previously owned by the late Wade F. B. Thompson, the Company's co-founder and former Chief Executive Officer. Alan Siegel, a member of the board of directors of the Company (the "Board"), is a co-executor of the Estate. The repurchase transaction was evaluated and approved by members of the Board who are not affiliated with the Estate. The Company used available cash to purchase the shares. The number of shares repurchased by the Company represented 1.8% of the Company's issued and outstanding common stock prior to the repurchase.

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The entire disclosure for an entity's treasury stock, including the average cost per share, carrying basis for each class of treasury stock, description of share repurchase program authorized by an entity's board of directors, the number of shares repurchased, the cost of the shares repurchased, the remaining maximum dollar value of shares available for repurchase under the program, the treatment of the purchase price in excess of the current market value, number of shares held for each class of treasury stock, and other information necessary to a fair presentation.

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