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Basis of Statement Presentation Level 2 (Policies)
 6 Months Ended
Jan. 31, 2021
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Trade Receivables We record an allowance for doubtful accounts based on our historical experience and a periodic review of our accounts receivable, including a review of the overall aging of accounts, consideration of customer credit risk and analysis of facts and circumstances about specific customer accounts. A customer account is determined to be uncollectible when it is probable that a loss will be incurred after we have completed our internal collection procedures, including termination of shipments, direct customer contact and formal demand of payment.
Overburden Removal and Mining Costs We mine sorbent materials on property that we either own or lease as part of our overall operations. A significant part of our overall mining cost is incurred during the process of removing the overburden (non-usable material) from the mine site, thus exposing the sorbent material used in a majority of our production processes. These
stripping costs are treated as a variable inventory production cost and are included in cost of sales in the period they are incurred. We defer and amortize the pre-production overburden removal costs associated with opening a new mine.

Additionally, it is our policy to capitalize the purchase cost of land and mineral rights, including associated legal fees, survey fees and real estate fees. The costs of obtaining mineral patents, including legal fees and drilling expenses, are also capitalized. Pre-production development costs on new mines and any prepaid royalties that may be offset against future royalties due upon extraction of the minerals are also capitalized. All exploration related costs are expensed as incurred.
Reclamation We perform ongoing reclamation activities during the normal course of our overburden removal. As overburden is removed from a mine site, it is hauled to previously mined sites and is used to refill older sites. This process allows us to continuously reclaim older mine sites and dispose of overburden simultaneously, therefore minimizing the costs associated with the reclamation process.
Leases ASC 842, Leases, provides that a contract is, or contains, a lease if it conveys the right to control the use of an identified asset and, accordingly, a lease liability and a related right-of-use (“ROU”) asset is recognized at the commencement date on our consolidated balance sheet. As provided in ASC 842, we have elected not to apply these measurement and recognition requirements to short-term leases (i.e., leases with a term of 12 months or less). Short-term leases will not be recorded as ROU assets or lease liabilities on our consolidated balance sheet, and the related lease payments will be recognized in net earnings on a straight-line basis over the lease term. For leases other than short-term leases, the lease liability is equal to the present value of unpaid lease payments over the remaining lease term. The lease term may reflect options to extend or terminate the lease when it is reasonably certain that such options will be exercised. To determine the present value of the lease liability, we used an incremental borrowing rate, which is defined as the rate of interest we would have to pay to borrow (on a collateralized basis over a similar term) an amount equal to the lease payments in similar economic environments. The ROU asset is based on the corresponding lease liability adjusted for certain costs such as initial direct costs, prepaid lease payments and lease incentives received. Both operating and finance lease ROU assets are reviewed for impairment, consistent with other long-lived assets, whenever events or changes in circumstances indicate that the carrying amount may not be recoverable. After a ROU asset is impaired, any remaining balance of the ROU asset is amortized on a straight-line basis over the shorter of the remaining lease term or the estimated useful life. After the lease commencement date, we evaluate lease modifications, if any, that could result in a change in the accounting for leases. Certain of our leases provide for variable lease payments that vary due to changes in facts and circumstances occurring after the commencement date, other than the passage of time. Variable lease payments that are dependent on an index or rate (e.g., Consumer Price Index) are included in the initial measurement of the lease liability and the ROU asset. Variable lease payments that are not known at the commencement date and are determinable based on the performance or use of the underlying asset, are expensed as incurred. Our variable lease payments primarily include common area maintenance charges based on the percentage of the total square footage leased and the usage of assets, such as photocopiers.Some of our contracts may contain lease components as well as non-lease components, such as an agreement to purchase services. As allowed under ASC 842, we have elected not to separate the lease components from non-lease components for all asset classes and we will not allocate the contract consideration to these components. This policy was applied to all existing leases upon adoption of ASC 842 and will be applied to new leases on an ongoing basis.
Revenue Recognition We recognize revenue when performance obligations under the terms of the contracts with customers are satisfied. Our performance obligation generally consists of the promise to sell finished products to wholesalers, distributors and retailers or consumers and our obligations have an original duration of one year or less. Control of the finished products are transferred upon shipment to, or receipt at, customers' locations, as determined by the specific terms of the contract. We have completed our performance obligation when control is transferred and we recognize revenue accordingly.
We have an unconditional right to consideration under the payment terms specified in the contract upon completion of the performance obligation. We may require certain customers to provide payment in advance of product shipment. We recorded a liability for these advance payments of $406,000 and $247,000 as of January 31, 2021 and July 31, 2020, respectively. This liability is reported in Other within Accrued Expenses on the unaudited Condensed Consolidated Balance Sheet. Revenue recognized during the six months ended January 31, 2021 that was included in the liability for advance payments at the beginning of the period was $197,000.

We routinely commit to one-time or ongoing trade promotion programs directly with consumers, such as coupon programs, and with customers, such as volume discounts, cooperative marketing and other arrangements. We estimate and accrue the expected costs of these programs. These costs are considered variable consideration under ASC 606, Revenue from Contracts with Customers, and are netted against sales when revenue is recorded. The accruals are based on our best estimate of the amounts
necessary to settle future and existing obligations on products sold as of the balance sheet date. To estimate these accruals, we rely on our historical experience of trade spending patterns and that of the industry, current trends and forecasted data.
Selling, General and Administrative Expenses Selling, general and administrative expenses (“SG&A”) include salaries, wages and benefits associated with staff outside the manufacturing and distribution functions, all marketing related costs, any miscellaneous trade spending expenses not required to be included in net sales, research and development costs, depreciation and amortization related to assets outside the manufacturing and distribution process and all other non-manufacturing and non-distribution expenses.
Other Noncurrent Liabilities On March 27, 2020, in response to the COVID-19 pandemic, the Coronavirus Aid, Relief, and Economic Security Act (the “CARES Act”) was signed into U.S. law. The CARES Act provides for, among other things, deferral of the employer portion of social security taxes incurred through the end of calendar 2020. As permitted by the CARES Act, we deferred approximately $400,000 of payroll taxes for the quarter ended January 31, 2021 (through December 2020) for an aggregate amount of approximately $2,300,000 in payroll taxes in calendar year 2020. The $2,300,000 will be paid equally in the fourth quarters of calendar years 2021 and 2022. The current portion of the accrual for these payroll taxes is included in Other within Accrued Expenses and the noncurrent portion of the accrual is included in Other within Noncurrent Liabilities on the unaudited Condensed Consolidated Balance Sheet.