3. REVENUE RECOGNITION

At the adoption of Topic 606, the cumulative effect of initially applying the new revenue standard is required to be presented as an adjustment to the opening balance of retained earnings. The Company determined there was no impact to opening retained earnings based on applying the new revenue standard.

The Company operates as one reportable segment, the healthcare delivery segment. The Company disaggregates revenue from contracts by service type and by payor. This level of detail provides useful information pertaining to how the Company generates revenue by significant revenue stream and by type of direct contracts. The condensed consolidated statements of operations present disaggregated revenue by service type. The following table presents disaggregated revenue for the three and nine months ended June 30, 2019 and 2018:

As of June 30, 2019, accounts receivable, net of allowance for doubtful accounts, was $183,400. The allowance for doubtful accounts reflects our best estimate of probable losses inherent in the accounts receivable balance. The Company determines the allowance based on historical experience, specific account information and other currently available evidence.

The Company receives payments from the following sources for services rendered: (i) commercial insurers; (ii) the federal government under the Medicare program administered by CMS; (iii) state governments under the Medicaid and other programs; (iv) other third-party payors (e.g., hospitals); and (v) individual patients and clients. As the period between the time of service and time of payment is typically one year or less, the Company elected the practical expedient under ASC 606-10-32-18 and did not adjust for the effects of a significant financing component.

The Company derives a significant portion of its revenue from Medicare, Medicaid and other payors that receive discounts from established billing rates. The Medicare and Medicaid regulations and various managed care contracts under which these discounts must be calculated are complex, subject to interpretation and adjustment, and may include multiple reimbursement mechanisms for different types of services provided and cost settlement provisions. Management estimates the transaction price on a payor-specific basis given its interpretation of the applicable regulations or contract terms. The services authorized and provided and related reimbursements are often subject to interpretation that could result in payments that differ from the Company's estimates. Additionally, updated regulations and contract renegotiations occur frequently, necessitating regular review and assessment of the estimation process by management.

Settlements under cost reimbursement agreements with third-party payors are estimated and recorded in the period in which the related services are rendered and are adjusted in future periods as final settlements are determined. Final determination of amounts earned under the Medicare and Medicaid programs often occurs in subsequent years because of audits by such programs, rights of appeal and the application of numerous technical provisions.

Under the new revenue standard, the Company has elected to apply the following practical expedients and optional exemptions:

Contract Assets

Typically, revenues and receivables are recognized once the Company has satisfied its performance obligation. Accordingly, the Company's contract assets are comprised of accounts receivable. Generally, the Company does not have material amounts of other contract assets.

Contract Liabilities (Deferred Revenue)

Contract liabilities are recorded when cash payments are received in advance of the Company's performance. The Company's contract liability balance was $175,800 and $159,700 as of June 30, 2019 and September 30, 2018 and is presented within the "Deferred Revenue" line item of the condensed consolidated balance sheets. $16,100 of the amounts recorded as of September 30, 2018 was recognized as revenue for the nine months ended June 30, 2019. The Company has elected the optional exemption to not disclose the remaining performance obligations of its contracts since substantially all of its contracts have a duration of one year or less.