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Revenue Recognition | 12 Months Ended
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Sep. 30, 2021
Revenue Recognition and Deferred Revenue [Abstract] |
Revenue from External Customers by Products and Services [Table Text Block] | 4. REVENUE RECOGNITION Contracts Our revenue is derived from contracts with customers, and we determine the appropriate accounting treatment for each contract at its inception. Our contracts primarily relate to electrical and mechanical contracting services, technology infrastructure products and services, and electro-mechanical solutions for industrial operations. Revenue is earned based upon an agreed fixed price or actual costs incurred plus an agreed upon percentage. We account for a contract when: (i) it has approval and commitment from both parties, (ii) the rights of the parties are identified, (iii) payment terms are identified, (iv) the contract has commercial substance, and (v) collectability of consideration is probable. We consider the start of a project to be when the above criteria have been met and we have written authorization from the customer to proceed. Performance Obligations A performance obligation is a promise in a contract to transfer a distinct good or service to the customer. A contract’s transaction price is allocated to each distinct performance obligation and recognized as revenue when, or as, the performance obligation is satisfied. We recognize revenue over time for the majority of the services we perform as (i) control continuously transfers to the customer as work progresses at a project location controlled by the customer and (ii) we have the right to bill the customer as costs are incurred. Within our Infrastructure Solutions segment, we often perform work inside our own facilities, where control does not continuously transfer to the customer as work progresses. In such cases, we evaluate whether we have the right to bill the customer as costs are incurred. Such assessment involves an evaluation of contractual termination clauses. Where we have a contractual right to payment for work performed to date, we recognize revenue over time. If we do not have such a right, we recognize revenue upon completion of the contract, when control of the work transfers to the customer. For fixed price arrangements, we use the percentage of completion method of accounting under which revenue recognized is measured principally by the costs incurred and accrued to date for each contract as a percentage of the estimated total cost for each contract at completion. Contract costs include all direct material, labor and indirect costs related to contract performance. Changes in job performance, job conditions, estimated contract costs and profitability and final contract settlements may result in revisions to costs and income, and the effects of these revisions are recognized in the period in which the revisions are determined. Provisions for estimated losses on uncompleted contracts are made in the period in which such losses are determined. This measurement and comparison process requires updates to the estimate of total costs to complete the contract, and these updates may include subjective assessments and judgments. Variable Consideration The transaction price for our contracts may include variable consideration, which includes changes to transaction price for approved and unapproved change orders, claims and incentives. Change orders, claims and incentives are generally not distinct from the existing contract due to the significant integration service provided in the context of the contract and are accounted for as a modification of the existing contract and performance obligation. We estimate variable consideration for a performance obligation at the probability weighted value we expect to receive (or the most probable amount we expect to incur in the case of liquidated damages, if any), utilizing estimation methods that best predict the amount of consideration to which we will be entitled (or will be incurred in the case of liquidated damages, if any). We include variable consideration in the estimated transaction price to the extent it is probable that a significant reversal of cumulative revenue recognized will not occur or when the uncertainty associated with the variable consideration is resolved. Our estimates of variable consideration and determination of whether to include estimated amounts in transaction price are based largely on an assessment of our anticipated performance and all information (historical, current and forecasted) that is reasonably available to us. The effect of variable consideration on the transaction price of a performance obligation is recognized as an adjustment to revenue on a cumulative catch-up basis. To the extent unapproved change orders and claims reflected in transaction price (or accounted for as a reduction of the transaction price in the case of liquidated damages) are not resolved in our favor, or to the extent incentives reflected in transaction price are not earned, there could be reductions in, or reversals of, previously recognized revenue. Disaggregation of Revenue We disaggregate our revenue from contracts with customers by activity and contract type, as these categories reflect how the nature, amount, timing and uncertainty of our revenue and cash flows are affected by economic factors. Our consolidated 2021, 2020, and 2019 revenue was derived from the following activities. See details in the following tables:
| Year Ended September 30,
| 2021 |  | 2020 |  | 2019
Communications | $ | 445,968 |  |  | $ | 395,141 |  |  | $ | 321,246 |
Residential |  |  |  |  |
Single-family | 454,449 |  |  | 239,140 |  |  | 212,358 |
Multi-family and Other | 232,898 |  |  | 172,650 |  |  | 100,978 |
Total Residential | 687,347 |  |  | 411,790 |  |  | 313,336 |
Infrastructure Solutions |  |  |  |  |
Industrial Services | 44,427 |  |  | 40,701 |  |  | 48,948 |
Custom Power Solutions | 102,553 |  |  | 87,678 |  |  | 87,842 |
Total Infrastructure Solutions | 146,980 |  |  | 128,379 |  |  | 136,790 |
Commercial & Industrial | 256,198 |  |  | 255,546 |  |  | 305,624 |
Total Revenue | $ | 1,536,493 |  |  | $ | 1,190,856 |  |  | $ | 1,076,996 |
|  | Year Ended September 30, 2021
|  |  | Communications |  | Residential |  | Infrastructure Solutions |  | Commercial & Industrial |  | Total
Fixed-price |  | $ | 327,496 |  |  | $ | 687,347 |  |  | $ | 139,532 |  |  | $ | 243,546 |  |  | $ | 1,397,921 |
Time-and-material |  | 118,472 |  |  | — |  |  | 7,448 |  |  | 12,652 |  |  | 138,572 |
Total revenue |  | $ | 445,968 |  |  | $ | 687,347 |  |  | $ | 146,980 |  |  | $ | 256,198 |  |  | $ | 1,536,493 |
|  | Year Ended September 30, 2020
|  |  | Communications |  | Residential |  | Infrastructure Solutions |  | Commercial & Industrial |  | Total
Fixed-price |  | $ | 309,567 |  |  | $ | 411,790 |  |  | $ | 121,922 |  |  | $ | 241,864 |  |  | $ | 1,085,143 |
Time-and-material |  | 85,574 |  |  | — |  |  | 6,457 |  |  | 13,682 |  |  | 105,713 |
Total revenue |  | $ | 395,141 |  |  | $ | 411,790 |  |  | $ | 128,379 |  |  | $ | 255,546 |  |  | $ | 1,190,856 |
|  | Year Ended September 30, 2019
|  |  | Communications |  | Residential |  | Infrastructure Solutions |  | Commercial & Industrial |  | Total
Fixed-price |  | $ | 229,143 |  |  | $ | 313,336 |  |  | $ | 129,096 |  |  | $ | 286,319 |  |  | $ | 957,894 |
Time-and-material |  | 92,103 |  |  | — |  |  | 7,694 |  |  | 19,305 |  |  | 119,102 |
Total revenue |  | $ | 321,246 |  |  | $ | 313,336 |  |  | $ | 136,790 |  |  | $ | 305,624 |  |  | $ | 1,076,996 |
Accounts Receivable Accounts receivable include amounts which we have billed or have an unconditional right to bill our customers. As of September 30, 2021, accounts receivable included $20,445 of unbilled receivables for which we have an unconditional right to bill. Contract Assets and Liabilities Project contracts typically provide for a schedule of billings on percentage of completion of specific tasks inherent in the fulfillment of our performance obligation(s). The schedules for such billings usually do not precisely match the schedule on which costs are incurred. As a result, contract revenue recognized in the statement of operations can and usually does differ from amounts that can be billed to the customer at any point during the contract. Amounts by which cumulative contract revenue recognized on a contract as of a given date exceeds cumulative billings and unbilled receivables to the customer under the contract are reflected as a current asset in our Consolidated Balance Sheets under the caption “Costs and estimated earnings in excess of billings”. Amounts by which cumulative billings to the customer under a contract as of a given date exceed cumulative contract revenue recognized are reflected as a current liability in our Consolidated Balance Sheets under the caption “Billings in excess of costs and estimated earnings”. During the years ended September 30, 2021 and 2020, we recognized revenue of $47,906 and $34,035 related to our contract liabilities at October 1, 2020 and 2019, respectively. We did not have any impairment losses recognized on our receivables or contract assets for the years ended September 30, 2021, 2020, or 2019. Remaining Performance Obligations Remaining performance obligations represent the unrecognized revenue value of our contract commitments. New awards represent the total expected revenue value of new contract commitments undertaken during a given period, as well as additions to the scope of existing contract commitments. Our new performance obligations vary significantly each reporting period based on the timing of our major new contract commitments. At September 30, 2021, we had remaining performance obligations of $713,274. The Company expects to recognize revenue on approximately $650,500 of the remaining performance obligations over the next 12 months, with the remaining recognized thereafter. For the year ended September 30, 2021, net revenue recognized from our performance obligations satisfied in previous periods was not material.

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- Definition The entire disclosure of revenue from contract with customer to transfer good or service and to transfer nonfinancial asset. Includes, but is not limited to, disaggregation of revenue, credit loss recognized from contract with customer, judgment and change in judgment related to contract with customer, and asset recognized from cost incurred to obtain or fulfill contract with customer. Excludes insurance and lease contracts. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -URI http://asc.fasb.org/topic&trid=49130388 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130551-203045 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130556-203045 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130550-203045 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130558-203045 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 12 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=123351226&loc=SL49130554-203045 + Details
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