| Document And Entity Information - shares | 6 Months Ended | |
| Sep. 30, 2015 | Nov. 20, 2015 | |
| Document Information [Line Items] | ||
| Document Type | 10-Q | |
| Amendment Flag | false | |
| Document Period End Date | Sep. 30, 2015 | |
| Document Fiscal Year Focus | 2,016 | |
| Document Fiscal Period Focus | Q2 | |
| Entity Registrant Name | NEWTOWN LANE MARKETING INC | |
| Entity Central Index Key | 1,353,538 | |
| Current Fiscal Year End Date | --03-31 | |
| Entity Filer Category | Smaller Reporting Company | |
| Trading Symbol | NTWN | |
| Entity Common Stock, Shares Outstanding | 13,757,550 |
| CONDENSED BALANCE SHEETS - USD ($) | Sep. 30, 2015 | Mar. 31, 2015 |
| Current Assets | ||
| Cash and cash equivalents | $ 6,793 | $ 34,490 |
| Prepaid assets | 2,500 | 3,125 |
| TOTAL CURRENT ASSETS | 9,293 | 37,615 |
| CURRENT LIABILITIES | ||
| Accounts payable and accrued expenses | 20,229 | 20,651 |
| Convertible notes payable - Related Party | 172,000 | 172,000 |
| TOTAL CURRENT LIABILITIES | 192,229 | 192,651 |
| COMMITMENTS AND CONTINGENCIES | 0 | 0 |
| STOCKHOLDERS' DEFICIT | ||
| Preferred stock, $0.001 par value, 1,000,000 shares authorized, none issued and outstanding | 0 | 0 |
| Common stock, $0.001 par value; 100,000,000 shares authorized, 13,757,550 shares issued and outstanding, respectively | 13,758 | 13,758 |
| Additional paid-in capital | 2,048,256 | 2,045,756 |
| Accumulated deficit | (2,244,950) | (2,214,550) |
| TOTAL STOCKHOLDERS' DEFICIT | (182,936) | (155,036) |
| TOTAL LIABILITIES AND STOCKHOLDERS' DEFICIT | $ 9,293 | $ 37,615 |
| CONDENSED BALANCE SHEETS [Parenthetical] - $ / shares | Sep. 30, 2015 | Mar. 31, 2015 |
| Preferred stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |
| Preferred stock, shares authorized | 1,000,000 | 1,000,000 |
| Preferred stock, issued | 0 | 0 |
| Preferred stock, outstanding | 0 | 0 |
| Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001 |
| Common stock, shares authorized | 100,000,000 | 100,000,000 |
| Common stock, shares issued | 13,757,550 | 13,757,550 |
| Common stock, shares outstanding | 13,757,550 | 13,757,550 |
| CONDENSED STATEMENTS OF OPERATIONS - USD ($) | 3 Months Ended | 6 Months Ended | ||
| Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | |
| Expenses | ||||
| Selling, general and administrative | $ 11,494 | $ 15,599 | $ 26,077 | $ 28,872 |
| Interest expense, net | 2,174 | 1,920 | 4,323 | 3,170 |
| Total expense | 13,668 | 17,519 | 30,400 | 32,042 |
| Other Income | ||||
| Net loss before provision for income taxes | (13,668) | (17,519) | (30,400) | (32,042) |
| Income taxes | 0 | 0 | 0 | 0 |
| Net loss | $ (13,668) | $ (17,519) | $ (30,400) | $ (32,042) |
| Net loss per share - basic and diluted (in dollors per share) | $ 0 | $ 0 | $ 0 | $ 0 |
| Weighted average shares outstanding - basic and diluted (in shares) | 13,757,550 | 13,757,550 | 13,757,550 | 13,757,550 |
| CONDENSED STATEMENT OF CHANGES IN STOCKHOLDERS' DEFICIT - 6 months ended Sep. 30, 2015 - USD ($) | Total | Preferred Stock [Member] | Common Stock [Member] | Additional Paid-in Capital [Member] | Accumulated Deficit [Member] |
| Balances at Mar. 31, 2015 | $ (155,036) | $ 0 | $ 13,758 | $ 2,045,756 | $ (2,214,550) |
| Balances (in shares) at Mar. 31, 2015 | 0 | 13,757,550 | |||
| Contributed Services | 2,500 | $ 0 | $ 0 | 2,500 | 0 |
| Net loss | (30,400) | 0 | 0 | 0 | (30,400) |
| Balances at Sep. 30, 2015 | $ (182,936) | $ 0 | $ 13,758 | $ 2,048,256 | $ (2,244,950) |
| Balances (in shares) at Sep. 30, 2015 | 0 | 13,757,550 |
| CONDENSED STATEMENTS OF CASH FLOWS - USD ($) | 6 Months Ended | |
| Sep. 30, 2015 | Sep. 30, 2014 | |
| CASH FLOWS FROM OPERATING ACTIVITIES | ||
| Net loss | $ (30,400) | $ (32,042) |
| Adjustments to reconcile net loss to cash used in operating activities: | ||
| Contributed services | 2,500 | 0 |
| Changes in operating assets and liabilities: | ||
| Decrease (increase) in other assets | 625 | (3,750) |
| Decrease in accounts payable and accruals | (422) | (956) |
| NET CASH USED IN OPERATING ACTIVITIES | (27,697) | (36,748) |
| NET CASH PROVIDED BY FINANCING ACTIVITIES | ||
| Issuance of notes payable | 0 | 72,000 |
| NET CASH PROVIDED BY FINANCING ACTIVITIES | 0 | 72,000 |
| NET CHANGE IN CASH AND CASH EQUIVALENTS | (27,697) | 35,252 |
| CASH AND CASH EQUIVALENTS AT BEGINNING OF PERIOD | 34,490 | 24,086 |
| CASH AND CASH EQUIVALENTS AT END OF PERIOD | $ 6,793 | $ 59,338 |
| DESCRIPTION OF COMPANY | 6 Months Ended |
| Sep. 30, 2015 | |
| Organization, Consolidation and Presentation Of Financial Statements [Abstract] | |
| Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] | NOTE 1 - DESCRIPTION OF COMPANY Newtown Lane Marketing, Incorporated (“we”, “our”, “us” or “Newtown”) was incorporated in Delaware on September 26, 2005. We previously held the exclusive license to exploit the Dreesen's Donut Brand in the United States with the exception of the states of Florida and Pennsylvania, and in Suffolk County, New York, which Dreesen retained for itself. In August 2007 there was a change in control, as detailed below, and we discontinued our efforts to promote the Dreesen's Donut Brand at that time. The license from Dreesen expired on December 31, 2007. The interim financial information as of September 30, 2015 and for the three and six month periods ended September 30, 2015 and 2014 have been prepared without audit, pursuant to the rules and regulations of the United States Securities and Exchange Commission (the “SEC”). Certain information and footnote disclosures normally included in financial statements prepared in accordance with generally accepted accounting principles have been condensed or omitted pursuant to such rules and regulations, although we believe that the disclosures made are adequate to provide for fair presentation. These financial statements should be read in conjunction with the financial statements and the notes thereto, included in our Annual Report on Form 10-K, for the fiscal year ended March 31, 2015, previously filed with the SEC. In the opinion of management, all adjustments (which include normal recurring adjustments) necessary to present a fair statement of our financial position as of September 30, 2015 and results of operations and cash flows for the three and six months ended September 30, 2015 and 2014, as applicable, have been made. The results of operations for the three and six months ended September 30, 2015 are not necessarily indicative of the operating results that may be expected for the full fiscal year or any future periods. EQUITY TRANSACTIONS On August 8, 2007 4,479,250 0.001 500 ) .001 14,820 600,000 On the Effective Date: (i) the Purchasers acquired control of Newtown, with (a) R&R acquiring nine million five hundred nine thousand four hundred forty ( 9,509,440 400 5,928,000 72 2,377,360 100 1,481,510 18 960,000 479,811 274,200 625,030 On the Effective Date: (i) Arnold P. Kling was appointed to our Board of Directors (“Board”) and served together with Vincent J. McGill, a then current director who continued to serve until August 20, 2007, the effective date of his resignation from our Board; (ii) all of our then officers and directors, with the exception of Mr. McGill, resigned from their respective positions with us; (iii) our Board appointed Mr. Kling as president and Kirk M. Warshaw as chief financial officer and secretary; and (iv) we relocated our headquarters to Chatham, New Jersey. Following Mr. McGill’s resignation from our Board on August 20, 2007, Mr. Kling became our sole director and president. On October 19, 2007, we put into effect an amendment to our Certificate of Incorporation to increase to 100,000,000 On December 19, 2007, the holders of all the issued and outstanding shares of Series A Preferred Stock elected to convert all of their shares into shares of Common Stock. As a result, the 500 7,407,540 500 001 On August 15, 2008 500 0.001 On August 29, 2008 1 for 50 50 In December 2008, we sold 550,000 2,000 11,750 On May 6, 2013, Ironbound Partners Fund, LLC (“Ironbound”) acquired 9,509,440 15,000 0.00157737 69.1 On May 14, 2013, Ironbound related party loaned $ 100,000 100,000 5.0 On August 15, 2013, we declared a stock dividend on our outstanding Common Stock for stockholders of record as of August 15, 2013 (the “Record Date”). As a result, all stockholders on the Record Date received nine new shares of Common Stock for each share of Common Stock owned by them as of the that date (the “2013 Stock Dividend”). All share and per share data herein has been retroactively restated to reflect the Reverse Split and the 2013 Stock Dividend, since the 2013 Stock Dividend was in substance a forward stock split. On July 25, 2014, we raised gross proceeds of $ 72,000 72,000 August 31, 2015 5.0 Further, on July 25, 2014, we issued an amended and restated convertible promissory note (the “Amended and Restated Note”) to Ironbound in the principal amount of $ 100,000 August 31, 2015 Effective September 1, 2015, the maturity dates of the “2014 Note” and “Amended and Restated Note” (collectively the “Notes”) have been extended from August 31, 2015 As of September 30, 2015, our authorized capital stock consisted of 100,000,000 1,000,000 13,757,550 During the six months ended September 30, 2015, we recorded a $ 2,500 THE COMPANY TODAY Since the Effective Date, our main purpose has been to serve as a vehicle to acquire an operating business and we are currently considered a “shell” company in as much as we are not generating revenues, do not own an operating business, and have no specific plan other than to engage in a merger or acquisition transaction with a yet-to-be identified operating company or business. Our principal business objective for the next 12 months and beyond such time will be to achieve long-term growth potential through a combination with an operating business rather than immediate, short-term earnings. We will not restrict our potential candidate target companies to any specific business, industry or geographical location and, thus, may acquire any type of business. The analysis of new business opportunities will be undertaken by or under the supervision of our officers and directors. We have no employees and no material assets. |
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES | 6 Months Ended |
| Sep. 30, 2015 | |
| Accounting Policies [Abstract] | |
| Significant Accounting Policies [Text Block] | NOTE 2 SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Since inception, Newtown has incurred an accumulated deficit of $ 2,244,950 80,143 60,820 |
| NEW ACCOUNTING PRONOUNCEMENTS | 6 Months Ended |
| Sep. 30, 2015 | |
| Accounting Changes and Error Corrections [Abstract] | |
| New Accounting Pronouncements and Changes in Accounting Principles [Text Block] | NOTE 3 NEW ACCOUNTING PRONOUNCEMENTS Except as set forth below, management does not believe that any other new accounting pronouncements not yet effective will have a material impact on our financial statements once adopted. In June 2014, FASB issued Accounting Standards Update (“ASU”) No. 2014-12, “ Compensation Stock Compensation (Topic 718); Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period”. Entities may apply the amendments in this ASU either (a) prospectively to all awards granted or modified after the effective date or (b) retrospectively to all awards with performance targets that are outstanding as of the beginning of the earliest annual period presented in the financial statements and to all new or modified awards thereafter. If retrospective transition is adopted, the cumulative effect of applying this ASU as of the beginning of the earliest annual period presented in the financial statements should be recognized as an adjustment to the opening retained earnings balance at that date. Additionally, if retrospective transition is adopted, an entity may use hindsight in measuring and recognizing the compensation cost. This updated guidance is not expected to have a material impact on our results of operations, cash flows or financial condition. In August 2014, the FASB issued ASU 2014-15 on “Presentation of Financial Statements Going Concern (Subtopic 205-40) Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern”. Currently, there is no guidance in U.S. GAAP about management’s responsibility to evaluate whether there is substantial doubt about an entity’s ability to continue as a going concern or to provide related footnote disclosures. The amendments in this ASU provide that guidance. In doing so, the amendments are intended to reduce diversity in the timing and content of footnote disclosures. The amendments require management to assess an entity’s ability to continue as a going concern by incorporating and expanding upon certain principles that are currently in U.S. auditing standards. Specifically, the amendments (1) provide a definition of the term substantial doubt, (2) require an evaluation every reporting period including interim periods, (3) provide principles for considering the mitigating effect of management’s plans, (4) require certain disclosures when substantial doubt is alleviated as a result of consideration of management’s plans, (5) require an express statement and other disclosures when substantial doubt is not alleviated, and (6) require an assessment for a period of one year after the date that the financial statements are issued (or available to be issued). The amendments in this ASU are effective for public and nonpublic entities for annual periods ending after December 15, 2016. Early adoption is permitted. |
| SUBSEQUENT EVENTS | 6 Months Ended |
| Sep. 30, 2015 | |
| Subsequent Events [Abstract] | |
| Schedule of Subsequent Events [Text Block] | NOTE 4 SUBSEQUENT EVENTS The Company has evaluated all subsequent events and has determined that there were no subsequent events to recognize or disclose in these financial statements. |
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies) | 6 Months Ended |
| Sep. 30, 2015 | |
| Accounting Policies [Abstract] | |
| Going Concern [Policy Text Block] | Going Concern - The accompanying financial statements have been prepared in conformity with accounting principles generally accepted in the United States of America, which contemplates Newtown continuing as a going concern. Our purpose has been to serve as a vehicle to acquire an operating business and we are currently considered a “shell” company inasmuch as we are not generating revenues, we do own an operating business, and have no specific plan other than to engage in a merger or acquisition transaction with a yet-to-be-identified operating company or business. We currently have no definitive agreements or understandings with any prospective business combination candidates and there are no assurances that we will find a suitable business with which to combine. The implementation of our business objectives is wholly contingent upon a business combination and/or the successful sale of our securities. We intend to utilize the proceeds of any offering, any sales of equity securities or debt securities, bank and other borrowings or a combination of those sources to effect a business combination with a target business which we believe may have significant growth potential. While we may, under certain circumstances, seek to effect business combinations with more than one target business, unless additional financing is obtained, we will not have sufficient proceeds remaining after an initial business combination to undertake additional business combinations. There is no assurance that these plans will be realized in whole or in part. The financial statements do not include any adjustments that might result from the outcome of these uncertainties. Since inception, Newtown has incurred an accumulated deficit of $ 2,244,950 80,143 60,820 |
| Use of Estimates, Policy [Policy Text Block] | Use of Estimates - The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and reported amounts of revenue and expenses during the reporting period. Actual results could differ from those estimates. |
| Fair Value of Financial Instruments, Policy [Policy Text Block] | Fair Value of Financial Instruments - Pursuant to the FASB guidance, "Disclosures About Fair Value of Financial Instruments," we are required to estimate the fair value of all financial instruments included on our balance sheet. We consider the carrying value of accrued expenses in the financial statements to approximate their face value. |
| Statements Of Cash Flows [Policy Text Block] | Statements of Cash Flows - For purposes of the statements of cash flows we consider all highly liquid investments purchased with a remaining maturity of three months or less to be cash equivalents. |
| DESCRIPTION OF COMPANY (Details Textual) - USD ($) | Aug. 08, 2007 | Jul. 25, 2014 | Dec. 31, 2008 | Dec. 19, 2007 | Sep. 30, 2015 | Sep. 30, 2014 | Mar. 31, 2015 | May. 14, 2013 | May. 06, 2013 | Aug. 15, 2008 | Oct. 19, 2007 |
| Equity Transactions | |||||||||||
| Stock Purchase Agreement Date | Aug. 8, 2007 | ||||||||||
| Stock Issued During Period, Shares, Conversion Of Convertible Securities | 14,820 | 50 | |||||||||
| Convertible Notes Payable | $ 960,000 | ||||||||||
| Convertible Notes Payable Principal and Accrued Interest Amount | 479,811 | ||||||||||
| Principal payments made on notes payable | $ 625,030 | ||||||||||
| Common Stock, Shares Authorized | 100,000,000 | 100,000,000 | 100,000,000 | ||||||||
| Common stock, shares issued | 13,757,550 | 13,757,550 | |||||||||
| Common Stock, Shares, Outstanding | 13,757,550 | 13,757,550 | |||||||||
| Preferred Stock, Shares Authorized | 1,000,000 | 1,000,000 | |||||||||
| Preferred Stock, Shares Issued | 0 | 0 | |||||||||
| Preferred Stock, Shares Outstanding | 0 | 0 | |||||||||
| Preferred stock, par value | $ 0.001 | $ 0.001 | |||||||||
| Stockholders' Equity, Reverse Stock Split | 1 for 50 | ||||||||||
| Series Preferred Elimination Date | Aug. 15, 2008 | ||||||||||
| Reverse Split Effective Date | Aug. 29, 2008 | ||||||||||
| Allocated Share-based Compensation Expense | $ 11,750 | ||||||||||
| Issuance of Stock and Warrants for Services or Claims | $ 2,500 | $ 0 | |||||||||
| Amended and Restated Note [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Debt Instrument, Face Amount | $ 100,000 | ||||||||||
| Debt Instrument, Maturity Date | Aug. 31, 2015 | ||||||||||
| Convertible Notes Payable [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Proceeds from Issuance of Debt | $ 72,000 | ||||||||||
| Debt Instrument, Face Amount | $ 72,000 | ||||||||||
| Debt Instrument, Maturity Date | Aug. 31, 2015 | ||||||||||
| Debt Instrument, Interest Rate During Period | 5.00% | ||||||||||
| Kirk M. Warshaw, LLC [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total | 550,000 | ||||||||||
| Stock Issued During Period, Value, Restricted Stock Award, Net of Forfeitures, Total | $ 2,000 | ||||||||||
| Ironbound Partners Fund LLC [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Convertible Notes Payable | $ 100,000 | ||||||||||
| Business Acquisition Cost Of Acquired Entity Purchases Price | $ 15,000 | ||||||||||
| Business Acquisition Shares Of Acquired Entity | 9,509,440 | ||||||||||
| Business Acquisition, Share Price | $ 0.00157737 | ||||||||||
| Business Acquisition Common Stock Shares Issued and Outstanding Percentage | 69.10% | ||||||||||
| Long-term Debt, Total | $ 100,000 | ||||||||||
| Debt Instrument, Interest Rate, Stated Percentage | 5.00% | ||||||||||
| Stock Purchase Agreement [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Stock Purchase Agreement Date | Aug. 8, 2007 | ||||||||||
| Common Stock [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Common stock, shares issued | 274,200 | ||||||||||
| Common Stock [Member] | R and R Biotech Partners, LLC [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Convertible Preferred Stock, Shares Issued upon Conversion | 400 | ||||||||||
| Common Stock Shares Issued Percentage | 72.00% | ||||||||||
| Common stock, shares issued | 9,509,440 | ||||||||||
| Common Stock [Member] | Moyo Partners, LLC [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Convertible Preferred Stock, Shares Issued upon Conversion | 100 | ||||||||||
| Common Stock Shares Issued Percentage | 18.00% | ||||||||||
| Common stock, shares issued | 2,377,360 | ||||||||||
| Common Stock [Member] | Stock Purchase Agreement [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Stock issued | 4,479,250 | ||||||||||
| Stock Issued During Period Par Value Per Share New Issues | $ 0.001 | ||||||||||
| Series A Preferred Stock [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Stock Issued During Period, Shares, Conversion Of Convertible Securities | 7,407,540 | ||||||||||
| Preferred Stock, Shares Outstanding | 500 | ||||||||||
| Preferred stock, par value | $ 1 | $ 0.001 | |||||||||
| Preferred Stock, Shares Subscribed but Unissued | 500 | 500 | |||||||||
| Series A Preferred Stock [Member] | R and R Biotech Partners, LLC [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Stock Issued During Period, Shares, Conversion Of Convertible Securities | 5,928,000 | ||||||||||
| Series A Preferred Stock [Member] | Moyo Partners, LLC [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Stock Issued During Period, Shares, Conversion Of Convertible Securities | 1,481,510 | ||||||||||
| Series A Preferred Stock [Member] | Stock Purchase Agreement [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Stock issued | 500 | ||||||||||
| Preferred stock, par value | $ 0.001 | ||||||||||
| Convertible Common Stock and Preferred Stock [Member] | Common Stock [Member] | Stock Purchase Agreement [Member] | |||||||||||
| Equity Transactions | |||||||||||
| Stock Issued In Connection With Convertible Notes | $ 600,000 |
| SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textual) - USD ($) | 3 Months Ended | 6 Months Ended | 12 Months Ended | |||
| Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014 | Mar. 31, 2015 | Mar. 31, 2014 | |
| Fair Value Measurements, Recurring and Nonrecurring, Valuation Techniques [Line Items] | ||||||
| Retained Earnings (Accumulated Deficit) | $ (2,244,950) | $ (2,244,950) | $ (2,214,550) | |||
| Net Income Loss | $ (13,668) | $ (17,519) | $ (30,400) | $ (32,042) | $ 80,143 | $ 60,820 |
