| Document and Entity Information - shares | 9 Months Ended | |
| Feb. 28, 2018 | Apr. 12, 2018 | |
| Document And Entity Information | ||
| Entity Registrant Name | Taylor Devices Inc | |
| Entity Central Index Key | 96,536 | |
| Document Type | 10-Q | |
| Document Period End Date | Feb. 28, 2018 | |
| Amendment Flag | false | |
| Current Fiscal Year End Date | --05-31 | |
| Is Entity a Well-known Seasoned Issuer? | No | |
| Is Entity a Voluntary Filer? | No | |
| Is Entity's Reporting Status Current? | Yes | |
| Entity Filer Category | Smaller Reporting Company | |
| Entity Common Stock, Shares Outstanding | 3,461,267 | |
| Document Fiscal Year Focus | 2,018 | |
| Document Fiscal Period Focus | Q3 |
| Condensed Consolidated Balance Sheets - USD ($) | Feb. 28, 2018 | May 31, 2017 |
| Current assets: | ||
| Cash and cash equivalents | $ 1,300,846 | $ 3,324,934 |
| Short-term investments | 1,033,329 | 1,022,326 |
| Accounts receivable, net | 5,342,276 | 2,545,773 |
| Inventory | 11,450,500 | 11,488,610 |
| Costs and estimated earnings in excess of billings | 8,047,216 | 6,868,393 |
| Other current assets | 359,885 | 427,478 |
| Total current assets | 27,534,052 | 25,677,514 |
| Maintenance and other inventory, net | 819,562 | 878,779 |
| Property and equipment, net | 9,977,285 | 9,994,716 |
| Other assets | 184,485 | 180,579 |
| Deferred income taxes | 265,115 | 429,115 |
| Total assets | 38,780,499 | 37,160,703 |
| Current liabilities: | ||
| Accounts payable | 1,459,934 | 1,329,321 |
| Accrued commissions | 1,105,711 | 846,941 |
| Billings in excess of costs and estimated earnings | 1,999,427 | 1,295,989 |
| Other current liabilities | 842,021 | 832,060 |
| Total current liabilities | 5,407,093 | 4,304,311 |
| Stockholders' Equity: | ||
| Common stock and additional paid-in capital | 9,356,578 | 9,170,041 |
| Retained earnings | 26,846,187 | 26,515,710 |
| Stockholders’ equity before treasury stock | 36,202,765 | 35,685,751 |
| Treasury stock - at cost | (2,829,359) | (2,829,359) |
| Total stockholders’ equity | 33,373,406 | 32,856,392 |
| Total liabilities and stockholders’ equity | $ 38,780,499 | $ 37,160,703 |
| Condensed Consolidated Statements of Income - USD ($) | 3 Months Ended | 9 Months Ended | ||
| Feb. 28, 2018 | Feb. 28, 2017 | Feb. 28, 2018 | Feb. 28, 2017 | |
| Income Statement [Abstract] | ||||
| Sales, net | $ 6,573,658 | $ 5,672,720 | $ 17,953,152 | $ 19,235,898 |
| Cost of goods sold | 5,118,242 | 4,028,768 | 13,618,393 | 13,397,852 |
| Gross profit | 1,455,416 | 1,643,952 | 4,334,759 | 5,838,046 |
| Selling, general and administrative expenses | 1,318,787 | 1,178,310 | 3,752,962 | 3,734,010 |
| Operating income | 136,629 | 465,642 | 581,797 | 2,104,036 |
| Other income, net | 8,954 | 14,561 | 19,680 | 50,281 |
| Income before provision for income taxes | 145,583 | 480,203 | 601,477 | 2,154,317 |
| Provision for income taxes | 169,000 | 142,000 | 271,000 | 668,000 |
| Net income (loss) | $ (23,417) | $ 338,203 | $ 330,477 | $ 1,486,317 |
| Basic and diluted earnings per common share | $ (0.01) | $ 0.10 | $ 0.09 | $ 0.43 |
| Condensed Consolidated Statements of Cash Flow - USD ($) | 9 Months Ended | |
| Feb. 28, 2018 | Feb. 28, 2017 | |
| Operating activities: | ||
| Net income | $ 330,477 | $ 1,486,317 |
| Adjustments to reconcile net income to net cash flows from operating activities: | ||
| Depreciation | 767,726 | 687,577 |
| Deferred income taxes | 164,000 | |
| Stock options issued for services | 56,497 | 78,789 |
| Changes in other assets and liabilities: | ||
| Accounts receivable | (2,796,503) | (194,837) |
| Inventory | 97,327 | (1,826,596) |
| Costs and estimated earnings in excess of billings | (1,178,823) | (2,208,506) |
| Other current assets | 67,593 | 60,528 |
| Accounts payable | 130,613 | (281,851) |
| Accrued commissions | 258,770 | 203,345 |
| Billings in excess of costs and estimated earnings | 703,438 | 17,632 |
| Other current liabilities | 9,961 | (1,847,704) |
| Net operating activities | (1,388,924) | (3,825,306) |
| Investing activities: | ||
| Acquisition of property and equipment | (750,295) | (1,622,046) |
| Other investing activities | (14,909) | (20,302) |
| Net investing activities | (765,204) | (1,642,348) |
| Financing activities: | ||
| Proceeds from issuance of common stock, net | 130,040 | 156,820 |
| Net change in cash and cash equivalents | (2,024,088) | (5,310,834) |
| Cash and cash equivalents - beginning | 3,324,934 | 6,086,080 |
| Cash and cash equivalents - ending | $ 1,300,846 | $ 775,246 |
| Notes to Condensed Consolidated Financial Statements | 9 Months Ended |
| Feb. 28, 2018 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Notes to Condensed Consolidated Financial Statements | 1. The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with accounting principles generally accepted in the United States of America for interim financial information and with the instructions to Form 10-Q. Accordingly, they do not include all of the information and footnotes required by accounting principles generally accepted in the United States of America for complete financial statements. In the opinion of the Company, the accompanying unaudited condensed consolidated financial statements contain all adjustments (consisting of only normal recurring accruals) necessary to present fairly the financial position as of February 28, 2018 and May 31, 2017, the results of operations for the three and nine months ended February 28, 2018 and 2017, and cash flows for the nine months ended February 28, 2018 and 2017. These financial statements should be read in conjunction with the audited financial statements and notes thereto contained in the Company's Annual Report to Shareholders for the year ended May 31, 2017. 2. The Company has evaluated events and transactions for potential recognition or disclosure in the financial statements through the date the financial statements were issued. 3. There is no provision nor shall there be any provisions for profit sharing, dividends, or any other benefits of any nature at any time for this fiscal year. 4. For the nine month periods ended February 28, 2018 and 2017, the net income was divided by 3,451,348 3,424,192 3,449,366 3,421,350 5. The results of operations for the three and nine month periods ended February 28, 2018 are not necessarily indicative of the results to be expected for the full year. 6. In May 2014, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) No. 2014-09, Revenue from Contracts with Customers. ASU 2014-09 is a comprehensive new revenue recognition model that requires a company to recognize revenue to depict the transfer of goods or services to a customer at an amount that reflects the consideration it expects to receive in exchange for those goods or services. ASU 2014-09 also requires additional disclosure about the nature, amount, timing and uncertainty of revenue and cash flows arising from customer contracts, including significant judgments and changes in judgments and assets recognized from costs incurred to obtain or fulfill a contract. ASU 2014-09, as amended, is effective for annual reporting periods, and interim periods within that period, beginning after December 15, 2017 (fiscal year 2019 for the Company). Companies may use either a full retrospective or a modified retrospective approach to adopt ASU 2014-09. The Company has not completely determined the potential effects of the adoption of ASU 2014-09 on its Consolidated Financial Statements, however it will likely require the Company to slow the recognition of revenue for some contracts currently accounted for under the percentage-of-completion method. Other recently issued Accounting Standards Codification (ASC) guidance has either been implemented or are not significant to the Company 7. Inventory: February 28, 2018 May 31, 2017 Raw materials $ 710,761 $ 709,174 Work-in-process 10,078,954 10,071,179 Finished goods 760,785 808,257 Gross inventory 11,550,500 11,588,610 Less allowance for obsolescence 100,000 100,000 Net inventory $ 11,450,500 $ 11,488,610 -6- Table of Contents 8. In December 2017, the Tax Cuts and Jobs Act (the 2017 Act) became law. It includes a broad range of tax reform proposals affecting businesses, including corporate tax rates, business deductions, and international tax provisions. Among the changes, the 2017 Act reduces the corporate rate from 34% to 21% for periods beginning after December 31, 2017. Because of the rate change, the Company recorded a non-cash write down of deferred tax assets and recognized incremental deferred tax expense of $164,000 during the quarter ended February 28, 2018. |
| Notes to Condensed Consolidated Financial Statements (Tables) | 9 Months Ended |
| Feb. 28, 2018 | |
| Inventory Disclosure [Abstract] | |
| Inventory | February 28, 2018 May 31, 2017 Raw materials $ 710,761 $ 709,174 Work-in-process 10,078,954 10,071,179 Finished goods 760,785 808,257 Gross inventory 11,550,500 11,588,610 Less allowance for obsolescence 100,000 100,000 Net inventory $ 11,450,500 $ 11,488,610 |
| Notes to Condensed Consolidated Financial Statements (Details Narrative) - shares | 3 Months Ended | 9 Months Ended | ||
| Feb. 28, 2018 | Feb. 28, 2017 | Feb. 28, 2018 | Feb. 28, 2017 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||||
| Weighted Average Number of Shares Outstanding, Basic and Diluted | 3,449,366 | 3,421,350 | 3,451,348 | 3,424,192 |
| Inventory (Details) - USD ($) | Feb. 28, 2018 | May 31, 2017 |
| Inventory Disclosure [Abstract] | ||
| Raw materials | $ 710,761 | $ 709,174 |
| Work-in-process | 10,078,954 | 10,071,179 |
| Finished goods | 760,785 | 808,257 |
| Gross inventory | 11,550,500 | 11,588,610 |
| Less allowance for obsolescence | 100,000 | 100,000 |
| Net inventory | $ 11,450,500 | $ 11,488,610 |
