| Document and Entity Information - USD ($) | 3 Months Ended | |
| Aug. 31, 2015 | Oct. 02, 2015 | |
| Document And Entity Information | ||
| Entity Registrant Name | Taylor Devices Inc | |
| Entity Central Index Key | 96,536 | |
| Document Type | 10-Q | |
| Document Period End Date | Aug. 31, 2015 | |
| 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 Public Float | $ 43,700,000 | |
| Entity Common Stock, Shares Outstanding | 3,372,637 | |
| Document Fiscal Period Focus | Q1 | |
| Document Fiscal Year Focus | 2,016 |
| Balance Sheets (Unaudited) - USD ($) | Aug. 31, 2015 | May. 31, 2015 |
| Current assets: | ||
| Cash and cash equivalents | $ 4,499,259 | $ 4,895,898 |
| Accounts receivable, net | 5,589,856 | 4,754,757 |
| Inventory | 9,199,072 | 8,662,056 |
| Costs and estimated earnings in excess of billings | 5,013,480 | 5,169,956 |
| Other current assets | 1,217,950 | 1,249,006 |
| Total current assets | 25,519,617 | 24,731,673 |
| Maintenance and other inventory, net | 829,766 | 889,929 |
| Property and equipment, net | 7,978,550 | 7,873,511 |
| Other assets | 171,297 | 169,995 |
| Total assets | 34,499,230 | 33,665,108 |
| Current liabilities: | ||
| Accounts payable | 2,506,538 | 2,703,065 |
| Accrued commissions | 723,252 | 763,463 |
| Billings in excess of costs and estimated earnings | 2,463,443 | 2,723,472 |
| Other current liabilities | 1,586,737 | 1,395,341 |
| Total current liabilities | 7,279,970 | 7,585,341 |
| Long-term liabilities | 628,785 | 628,785 |
| Stockholders' Equity: | ||
| Common stock and additional paid-in capital | 8,202,776 | 8,072,932 |
| Retained earnings | 20,986,557 | 19,976,908 |
| Treasury stock - at cost | (2,598,858) | (2,598,858) |
| Total stockholders'equity | 26,590,475 | 25,450,982 |
| Total liabilities and shareholders' equity | $ 34,499,230 | $ 33,665,108 |
| Statements of Operations (Unaudited) - USD ($) | 3 Months Ended | |
| Aug. 31, 2015 | Aug. 31, 2014 | |
| Income Statement [Abstract] | ||
| Sales, net | $ 9,473,414 | $ 6,551,382 |
| Cost of goods sold | 6,098,126 | 4,866,275 |
| Gross profit | 3,375,288 | 1,685,107 |
| Selling, general and administrative expenses | 1,826,989 | 1,086,679 |
| Operating income | 1,548,299 | 598,428 |
| Other income, net | 3,350 | 3,878 |
| Income before provision for income taxes | 1,551,649 | 602,306 |
| Provision for income taxes | 542,000 | 210,000 |
| Net income | $ 1,009,649 | $ 392,306 |
| Basic and diluted earnings per common share | $ 0.30 | $ 0.12 |
| Statements of Cash Flows (Unaudited) - USD ($) | 3 Months Ended | |
| Aug. 31, 2015 | Aug. 31, 2014 | |
| Operating activities: | ||
| Net income | $ 1,009,649 | $ 392,306 |
| Adjustments to reconcile net income to net cash flows from operating activities: | ||
| Depreciation | 193,625 | 185,628 |
| Stock options issued for services | 60,719 | 37,112 |
| Changes in other assets and liabilities: | ||
| Accounts receivable | (835,099) | (366,555) |
| Inventory | (476,853) | 331,491 |
| Costs and estimated earnings in excess of billings | 156,476 | (1,148,099) |
| Other current assets | 31,056 | (9,274) |
| Accounts payable | (196,527) | 620,836 |
| Accrued commissions | (40,211) | 23,291 |
| Billings in excess of costs and estimated earnings | (260,029) | 537,975 |
| Other current liabilities | 191,396 | 210,971 |
| Net operating activities | (165,798) | 815,682 |
| Investing activities: | ||
| Acquisition of property and equipment | (298,664) | (110,388) |
| Other investing activities | (1,302) | (1,335) |
| Net investing activities | (299,966) | (111,723) |
| Financing activities: | ||
| Proceeds from issuance of common stock, net | 69,125 | 4,221 |
| Net financing activities | 69,125 | 4,221 |
| Net change in cash and cash equivalents | (396,639) | 708,180 |
| Cash and cash equivalents - beginning | 4,895,898 | 2,793,642 |
| Cash and cash equivalents - ending | $ 4,499,259 | $ 3,501,822 |
| Condensed financial statements note | 3 Months Ended |
| Aug. 31, 2015 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Condensed financial statements note | 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 August 31, 2015 and May 31, 2015, the results of operations for the three months ended August 31, 2015 and 2014, and cash flows for the three months ended August 31, 2015 and 2014. 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, 2015. 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 three month periods ended August 31, 2015 and August 31, 2014, the net income was divided by 3,365,821 and 3,342,934 respectively, which is net of the Treasury shares, to calculate the net income per share. 5. The results of operations for the three month period ended August 31, 2015 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 yet determined the potential effects of the adoption of ASU 2014-09 on its Consolidated Financial Statements. Other recently issued Accounting Standards Codification (ASC) guidance has either been implemented or are not significant to the Company. |
| Condensed financial statements note (Details Narrative) - shares | 3 Months Ended | |
| Aug. 31, 2015 | Aug. 31, 2014 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | ||
| Weighted average common shares outstanding | 3,365,821 | 3,342,934 |
