Subsequent Event (Notes)	3 Months Ended
Oct. 31, 2013
Subsequent Events [Abstract]
Subsequent Events [Text Block]	SUBSEQUENT EVENT On November 1, 2013, we acquired certain assets of MFM Industries, Inc. (“MFM”), including the customer list, mining and manufacturing equipment, packaging materials, inventory, intellectual property and other clay cat litter business assets. We will not operate the MFM plant and we did not acquire any land or mineral rights. MFM's customers' orders are being transferred to our cat litter manufacturing plants with available capacity and similar cat litter products. This transaction qualifies as a business combination for accounting purposes. Prior to October 31, 2013, an $800,000 deposit was paid to be held in trust and was subsequently applied upon the closing of the transaction toward the MFM acquisition purchase price. This deposit was included in other assets on the Condensed Consolidated Balance Sheets as of October 31, 2013. We also incurred approximately $116,000 for certain acquisition-related costs during the first quarter of fiscal 2014, which are included in selling, general and administrative expenses on the Condensed Consolidated Statements of Income and Retained Earnings. When the transaction closed on November 1, 2013, an additional $11,900,000 payment was made, plus a $500,000 payment was deposited in escrow to satisfy our obligation, if any, to indemnify MFM for expenses incurred to prepare and sell the land retained by MFM. We used existing cash and investment balances to fund these payments. In addition, under the purchase agreement, we are entitled to receive half of any proceeds resulting from the ultimate sale of the real property. Further information about this acquisition is not available as of the date of filing of this Form 10-Q because the results of the business valuation are pending and the parties are still in the process of working through certain post-closing provisions under the terms of the purchase agreement, including terms which may adjust the final purchase price. As of the date of filing of this Form 10-Q, we expect there to be a reduction in the final purchase price based upon the post-closing inventory adjustment provisions and therefore expect to receive a payment from MFM of approximately $100,000.

SUBSEQUENT EVENT

On November 1, 2013, we acquired certain assets of MFM Industries, Inc. (“MFM”), including the customer list, mining and manufacturing equipment, packaging materials, inventory, intellectual property and other clay cat litter business assets. We will not operate the MFM plant and we did not acquire any land or mineral rights. MFM's customers' orders are being transferred to our cat litter manufacturing plants with available capacity and similar cat litter products. This transaction qualifies as a business combination for accounting purposes.

Prior to October 31, 2013, an $800,000 deposit was paid to be held in trust and was subsequently applied upon the closing of the transaction toward the MFM acquisition purchase price. This deposit was included in other assets on the Condensed Consolidated Balance Sheets as of October 31, 2013. We also incurred approximately $116,000 for certain acquisition-related costs during the first quarter of fiscal 2014, which are included in selling, general and administrative expenses on the Condensed Consolidated Statements of Income and Retained Earnings.

When the transaction closed on November 1, 2013, an additional $11,900,000 payment was made, plus a $500,000 payment was deposited in escrow to satisfy our obligation, if any, to indemnify MFM for expenses incurred to prepare and sell the land retained by MFM. We used existing cash and investment balances to fund these payments. In addition, under the purchase agreement, we are entitled to receive half of any proceeds resulting from the ultimate sale of the real property.

Further information about this acquisition is not available as of the date of filing of this Form 10-Q because the results of the business valuation are pending and the parties are still in the process of working through certain post-closing provisions under the terms of the purchase agreement, including terms which may adjust the final purchase price. As of the date of filing of this Form 10-Q, we expect there to be a reduction in the final purchase price based upon the post-closing inventory adjustment provisions and therefore expect to receive a payment from MFM of approximately $100,000.