| DOCUMENT AND ENTITY INFORMATION - shares | 3 Months Ended | |
| Mar. 31, 2016 | May. 13, 2016 | |
| Document and Entity Information [Abstract] | ||
| Entity Registrant Name | EUROSITE POWER INC. | |
| Entity Central Index Key | 1,528,103 | |
| Current Fiscal Year End Date | --12-31 | |
| Entity Filer Category | Smaller Reporting Company | |
| Trading Symbol | eusp | |
| Entity Common Stock, Shares Outstanding | 65,747,100 | |
| Document Type | 10-Q | |
| Amendment Flag | false | |
| Document Period End Date | Mar. 31, 2016 | |
| Document Fiscal Period Focus | Q1 | |
| Document Fiscal Year Focus | 2,016 |
| CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) | Mar. 31, 2016 | Dec. 31, 2015 |
| Current assets: | ||
| Cash and cash equivalents | $ 438,942 | $ 587,819 |
| Accounts receivable | 371,916 | 303,782 |
| UK energy tax incentives receivable | 0 | 369,485 |
| Value added and other tax receivable | 26,756 | (5,297) |
| Inventory | 202,894 | 137,093 |
| Other current assets | 41,143 | 57,152 |
| Total current assets | 1,081,651 | 1,450,034 |
| Property and equipment, net | 7,612,831 | 7,516,262 |
| Other assets, long-term | 9,564 | 11,004 |
| TOTAL ASSETS | 8,704,046 | 8,977,300 |
| Current liabilities: | ||
| Accounts payable | 371,824 | 313,293 |
| Due to related party | 180,624 | 98,979 |
| Accrued expenses and other current liabilities | 270,565 | 286,814 |
| Total current liabilities | 823,013 | 699,086 |
| Long-term liabilities: | ||
| Convertible debentures | 1,570,219 | 1,585,264 |
| Convertible debentures due to related parties | 942,131 | 951,158 |
| Note payable - related party | 2,000,000 | 2,000,000 |
| Total liabilities | $ 5,335,363 | $ 5,235,508 |
| Commitments and contingencies | ||
| Stockholders’ equity: | ||
| Common stock, $0.001 par value; 100,000,000 shares authorized; 65,747,100 issued and outstanding at March 31, 2016 and December 31, 2015 | $ 65,747 | $ 65,747 |
| Additional paid-in capital | 12,242,416 | 12,224,064 |
| Accumulated deficit | (8,939,480) | (8,548,019) |
| Total stockholders' equity | 3,368,683 | 3,741,792 |
| TOTAL LIABILITIES AND STOCKHOLDERS’ EQUITY | $ 8,704,046 | $ 8,977,300 |
| CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) (Parenthetical) - $ / shares | Mar. 31, 2016 | Dec. 31, 2015 |
| Statement of Financial Position [Abstract] | ||
| 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 | 65,747,100 | 65,747,100 |
| Common stock, shares outstanding | 65,747,100 | 65,747,100 |
| CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) | 3 Months Ended | |
| Mar. 31, 2016 | Mar. 31, 2015 | |
| Revenues | ||
| Energy revenues | $ 685,716 | $ 530,648 |
| Turnkey & other revenues | 1,316 | 17,406 |
| Revenue, Net | 687,032 | 548,054 |
| Cost of sales | ||
| Fuel, maintenance and installation | 431,397 | 414,972 |
| Depreciation expense | 112,995 | 90,392 |
| Cost of Services | 544,392 | 505,364 |
| Gross profit | 142,640 | 42,690 |
| Operating expenses | ||
| General and administrative | 300,092 | 303,340 |
| Selling | 132,929 | 129,449 |
| Engineering | 88,490 | 30,718 |
| Operating Expenses | 521,511 | 463,507 |
| Loss from operations | (378,871) | (420,817) |
| Other income (expense) | ||
| Interest and other income | 126 | 2,697 |
| Interest expense | (12,716) | (12,277) |
| Nonoperating Income (Expense) | (12,590) | (9,580) |
| Loss before income taxes | (391,461) | (430,397) |
| Provision (benefit) for income taxes | 0 | 0 |
| Net loss | $ (391,461) | $ (430,397) |
| Net loss per share - basic and diluted (in dollars per share) | $ (0.01) | $ (0.01) |
| Weighted-average shares outstanding - basic and diluted (in shares) | 65,747,100 | 65,747,100 |
| CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) | 3 Months Ended | |
| Mar. 31, 2016 | Mar. 31, 2015 | |
| CASH FLOWS FROM OPERATING ACTIVITIES: | ||
| Net loss | $ (391,461) | $ (430,397) |
| Adjustments to reconcile net loss to net cash provided by (used in) operating activities: | ||
| Depreciation | 114,884 | 90,987 |
| Amortization of convertible debt premium | (24,072) | (24,072) |
| Stock-based compensation | 18,352 | 30,863 |
| Changes in operating assets and liabilities | ||
| Accounts receivable | (68,134) | (35,022) |
| UK energy tax incentives receivable | 369,485 | 0 |
| Value added and other tax receivable | (32,053) | 80,547 |
| Inventory | (65,801) | (4,131) |
| Prepaid and other current assets | 16,009 | (1,832) |
| Other assets, long-term | 1,440 | 1,440 |
| Increase (decrease) in: | ||
| Accounts payable | 58,531 | 87,727 |
| Due to related party | 81,645 | 12,963 |
| Accrued expenses and other current liabilities | (16,249) | (17,871) |
| Net cash provided by (used in) operating activities | 62,576 | (208,798) |
| CASH FLOWS FROM INVESTING ACTIVITIES: | ||
| Purchases of property and equipment | (211,453) | (547,171) |
| Net cash used in investing activities | (211,453) | (547,171) |
| CASH FLOWS FROM FINANCING ACTIVITIES: | ||
| Payment on note payable - related party | 0 | (1,000,000) |
| Net cash used in financing activities | 0 | (1,000,000) |
| Net decrease in cash and cash equivalents | (148,877) | (1,755,969) |
| Cash and cash equivalents, beginning of the period | 587,819 | 3,776,852 |
| Cash and cash equivalents, end of the period | 438,942 | 2,020,883 |
| Supplemental disclosures of cash flow information: | ||
| Taxes paid | 0 | 6,750 |
| Interest paid | $ 0 | $ 0 |
| Description of Business and Basis of Presentation | 3 Months Ended |
| Mar. 31, 2016 | |
| Accounting Policies [Abstract] | |
| Description of Business and Basis of Presentation | Description of Business and Basis of Presentation Description of Business EuroSite Power Inc., (the "Company", we, our, or us), distributes, owns and operates clean, on-site energy systems that produce electricity, hot water and heat and cooling in the United Kingdom. We provide comprehensive power purchase style thermal and power generation solutions to our customers. These solutions include equipment installation as well as operation and ongoing maintenance under multi-year service agreements at no upfront cost to the customer. We own and operate the equipment that we install at customers' facilities and sell the energy produced by these systems to the customers on a long-term contractual basis at prices guaranteed to the customer to be below conventional utility rates. We call this business the EuroSite Power “On-Site Utility” model. The Company was incorporated as a Delaware corporation on July 9, 2010 as a subsidiary of American DG Energy Inc., or American DG Energy. On September 17, 2010, the Company registered EuroSite Power Limited as a wholly-owned subsidiary with the Registrar of Companies for England and Wales to introduce the American DG Energy business model to the United Kingdom and the European market, although as of March 31, 2016 , we operated in the United Kingdom only. The Company has experienced total net losses since inception of approximately $8.9 million . For the foreseeable future, the Company expects to experience continuing operating losses and negative cash flows from operations as its management executes its current business plan. The Company believes that its existing resources, including cash and cash equivalents, future cash flow from operations, its ability to control certain costs, including those related to general and administrative expenses, the project financing arrangements, the line of credit available from its CEO, and the use of capital from American DG Energy, will be sufficient to meet the working capital requirements of its existing business for the foreseeable future; however, as the Company continues to grow its business by adding more energy systems, the cash requirements will increase. The Company is engaged in continual fundraising efforts, primarily for the installation of energy systems. On May 10, 2016, the Company announced a private placement of up to $10 million at $0.575 per share of its common stock. As of the day of the announcement, various accredited investors had subscribed to $7.25 million of the available private placement shares. The Company plans to use these funds to first pay off its debt to its Chairman, of $2,000,000 , with the balance to be used to fund operations and growth. Closing has been set for May 30, 2016. Basis of Presentation The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three months ended March 31, 2016 are not necessarily indicative of the results that may be expected for the year ended December 31, 2016 . The condensed consolidated balance sheet at December 31, 2015 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015 , or the Annual Report. There have been no significant changes in accounting principles, practices or inherent estimates from those reported in the Annual Report. The accompanying consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary EuroSite Power Limited, a United Kingdom registered company. The Company’s operations are comprised of one business segment. The Company’s business is to sell energy in the form of electricity, heat, hot water and cooling to its customers under long-term sales agreements. |
| Loss Per Common Share | 3 Months Ended |
| Mar. 31, 2016 | |
| Earnings Per Share [Abstract] | |
| Loss Per Common Share | Loss Per Common Share The Company computes basic loss per share by dividing net loss for the period by the weighted-average number of shares of Common Stock outstanding during the period. The Company computes its diluted earnings per common share using the treasury stock method. For purposes of calculating diluted earnings per share, the Company considers its shares issuable in connection with stock options, warrants and debentures to be dilutive Common Stock equivalents when the exercise price is less than the average fair market value of the Company’s Common Stock for the period. For the three months ended March 31, 2016 , the Company excluded 11,210,000 potentially dilutive shares resulting from stock options, warrants and convertible debentures. For the three months ended March 31, 2015 , the Company excluded 11,305,000 potentially dilutive shares resulting from stock options, warrants and convertible debentures. All shares issuable for both periods were anti-dilutive as a result of the reported net loss. |
| Income Taxes | 3 Months Ended |
| Mar. 31, 2016 | |
| Income Tax Disclosure [Abstract] | |
| Income Taxes | Income Taxes The provision (benefit) for income taxes in the accompanying consolidated statements of operations for the three months ended March 31, 2016 and 2015 differs from that which would be expected by applying the federal and foreign statutory tax rate primarily due to losses for which no benefit is recognized. |
| Related Parties | 3 Months Ended |
| Mar. 31, 2016 | |
| Related Party Transactions [Abstract] | |
| Related Parties | Related Parties American DG Energy, Tecogen and Ilios, are affiliated companies by virtue of common ownership and common leadership. The Company purchases some of its energy equipment from American DG Energy, its parent. American DG Energy purchases energy equipment primarily from Tecogen, an affiliate of the Company, which manufactures natural gas, engine-driven commercial and industrial cooling and cogeneration systems, and from Ilios Inc., or Ilios, a majority-owned subsidiary of Tecogen which is developing a line of ultra-high efficiency heating products, such as a high efficiency water heater, for commercial and industrial applications utilizing advanced thermodynamic principles. Elias Samaras is the Company's Chief Executive Officer, President, and a member of the board of directors. He is also a member of the board of directors of American DG Energy. His Company salary is $1.00 per year, exclusive of option awards. On average, Dr. Samaras spends approximately 60% of his business time on the affairs of the Company, but such amount varies widely depending on the needs of the business and is expected to increase as the business of the Company develops. John N. Hatsopoulos is the chairman of the Company's board of directors and is also the Co-Chief Executive Officer of American DG Energy and Tecogen. He is also a member of the board of directors of Tecogen. His Company salary is $1.00 per year. On average, Mr. Hatsopoulos spends approximately 20% of his business time on the affairs of the Company, but such amount varies widely depending on the needs of the business and is expected to increase as the business of the Company develops. Bonnie J. Brown is the Chief Financial Officer, treasurer and secretary of the Company and American DG Energy. Her salary is paid by American DG Energy; however a portion was reimbursed by the Company according to the requirements of the business. On average, Ms. Brown spends approximately 25% of her business time on the affairs of the Company, but such amount varies widely depending on the needs of the business. Gabriel J. Parmese, was the Chief Financial Officer, treasurer and secretary of the Company and American DG Energy until August 12, 2015. His salary was paid by American DG Energy; however a portion was reimbursed by the Company according to the requirements of the business. On average, Mr. Parmese spent approximately 15% of his business time on the affairs of the Company, but such amount varied widely depending on the needs of the business. During the first quarter of 2015 , the Company prepaid $1,000,000 of a related party note according to the terms of the agreement, leaving an outstanding balance of $2,000,000 . On July 7, 2015, the Company entered into a Revolving Line of Credit Agreement, (or the "Agreement"), with Elias Samaras, who is the Company's Chief Executive Officer, President, and a member of the board of directors. Under the terms of the Agreement, Dr. Samaras has agreed to lend the Company up to an aggregate of $1 million , at the written request of the Company. Any amounts borrowed by the Company pursuant to the Agreement will bear interest at 6% per year. Interest is due and payable quarterly in arrears. The term of the Agreement is from July 7, 2015 to June 30, 2017. Repayment of the principal amount borrowed pursuant to the Agreement will be due on June 30, 2017. Prepayment of any amounts due under the Agreement may be made at any time without penalty. As of March 31, 2016 , no amounts have been drawn on this line. The Company’s headquarters are located in Waltham, Massachusetts and consist of 3,282 square feet of office and storage space used by our parent, American DG Energy and leased from Tecogen. American DG Energy is not currently charging the Company for utilizing its share of office space in the United States since it believes it is insignificant. The amount due to Tecogen as of March 31, 2016 was $180,624 for service contracts on our sites. |
| Commitments and Contingencies | 3 Months Ended |
| Mar. 31, 2016 | |
| Commitments and Contingencies Disclosure [Abstract] | |
| Commitments and Contingencies | Commitments and Contingencies The Company has certain commitments through its agreements with Tecogen, Ilios, and other related parties. See Note 4 "Related Parties" for more detail. |
| Subsequent Events | 3 Months Ended |
| Mar. 31, 2016 | |
| Subsequent Events [Abstract] | |
| Subsequent Events | Subsequent Events On May 12, 2016, the Company announced a private placement of $7.25 million at $0.575 per share of its common stock. As of the day of announcement, various accredited investors had subscribed to $7.25 million of the private placement. The Company plans to use these funds to first pay off its debt to its Chairman, of $2,000,000 , with the balance to be used to fund operations and growth. Closing has been set for June 8, 2016. The Company has evaluated subsequent events through the date of this filing and determined that no other subsequent events occurred that would require recognition in the consolidated financial statements or disclosure in the notes thereto. |
| Description of Business and Basis of Presentation (Policies) | 3 Months Ended |
| Mar. 31, 2016 | |
| Accounting Policies [Abstract] | |
| Description of Business | EuroSite Power Inc., (the "Company", we, our, or us), distributes, owns and operates clean, on-site energy systems that produce electricity, hot water and heat and cooling in the United Kingdom. We provide comprehensive power purchase style thermal and power generation solutions to our customers. These solutions include equipment installation as well as operation and ongoing maintenance under multi-year service agreements at no upfront cost to the customer. We own and operate the equipment that we install at customers' facilities and sell the energy produced by these systems to the customers on a long-term contractual basis at prices guaranteed to the customer to be below conventional utility rates. We call this business the EuroSite Power “On-Site Utility” model. The Company was incorporated as a Delaware corporation on July 9, 2010 as a subsidiary of American DG Energy Inc., or American DG Energy. On September 17, 2010, the Company registered EuroSite Power Limited as a wholly-owned subsidiary with the Registrar of Companies for England and Wales to introduce the American DG Energy business model to the United Kingdom and the European market, although as of March 31, 2016 , we operated in the United Kingdom only. The Company has experienced total net losses since inception of approximately $8.9 million . For the foreseeable future, the Company expects to experience continuing operating losses and negative cash flows from operations as its management executes its current business plan. The Company believes that its existing resources, including cash and cash equivalents, future cash flow from operations, its ability to control certain costs, including those related to general and administrative expenses, the project financing arrangements, the line of credit available from its CEO, and the use of capital from American DG Energy, will be sufficient to meet the working capital requirements of its existing business for the foreseeable future; however, as the Company continues to grow its business by adding more energy systems, the cash requirements will increase. The Company is engaged in continual fundraising efforts, primarily for the installation of energy systems. On May 10, 2016, the Company announced a private placement of up to $10 million at $0.575 per share of its common stock. As of the day of the announcement, various accredited investors had subscribed to $7.25 million of the available private placement shares. The Company plans to use these funds to first pay off its debt to its Chairman, of $2,000,000 , with the balance to be used to fund operations and growth. Closing has been set for May 30, 2016. |
| Basis of Presentation | The accompanying unaudited condensed consolidated financial statements have been prepared in accordance with generally accepted accounting principles for interim financial information and with the instructions to Form 10-Q and Article 8 of Regulation S-X. Accordingly, they do not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. In the opinion of management, all adjustments (consisting of normal recurring accruals) considered necessary for a fair presentation have been included. Operating results for the three months ended March 31, 2016 are not necessarily indicative of the results that may be expected for the year ended December 31, 2016 . The condensed consolidated balance sheet at December 31, 2015 has been derived from the audited consolidated financial statements at that date but does not include all of the information and footnotes required by generally accepted accounting principles for complete financial statements. For further information, refer to the consolidated financial statements and footnotes thereto included in the Company's Annual Report on Form 10-K for the year ended December 31, 2015 , or the Annual Report. There have been no significant changes in accounting principles, practices or inherent estimates from those reported in the Annual Report. The accompanying consolidated financial statements include the accounts of the Company and its wholly-owned subsidiary EuroSite Power Limited, a United Kingdom registered company. The Company’s operations are comprised of one business segment. The Company’s business is to sell energy in the form of electricity, heat, hot water and cooling to its customers under long-term sales agreements. |
| Description of Business and Basis of Presentation (Details) | May. 12, 2016USD ($)$ / shares | May. 30, 2016USD ($) | Mar. 31, 2016USD ($)segment | Mar. 31, 2015USD ($) | May. 10, 2016USD ($)$ / shares | Dec. 31, 2015USD ($) |
| Class of Stock [Line Items] | ||||||
| Accumulated deficit | $ (8,939,480) | $ (8,548,019) | ||||
| Amount of debt to be repaid with proceeds | $ 0 | $ 1,000,000 | ||||
| Number of Operating Segments | segment | 1 | |||||
| Subsequent Event | Private Placement | ||||||
| Class of Stock [Line Items] | ||||||
| Share Price | $ / shares | $ 0.575 | $ 0.575 | ||||
| Stock subscriptions from investors | $ 7,250,000 | $ 7,250,000 | ||||
| Scenario, Forecast | Private Placement | ||||||
| Class of Stock [Line Items] | ||||||
| Maximum proceeds from private placement | 7,250,000 | $ 10,000,000 | ||||
| Board of Directors Chairman | Scenario, Forecast | Private Placement | ||||||
| Class of Stock [Line Items] | ||||||
| Amount of debt to be repaid with proceeds | $ 2,000,000 | $ 2,000,000 |
| Loss Per Common Share (Details) - shares | 3 Months Ended | |
| Mar. 31, 2016 | Mar. 31, 2015 | |
| Earnings Per Share [Abstract] | ||
| Antidilutive securities excluded from computation of earnings per share | 11,210,000 | 11,305,000 |
| Related Parties (Details) | 3 Months Ended | 7 Months Ended | ||
| Mar. 31, 2016USD ($)ft² | Mar. 31, 2015USD ($) | Aug. 12, 2015 | Jul. 07, 2015USD ($) | |
| Related Party Transaction [Line Items] | ||||
| Repayments of related party note | $ 0 | $ 1,000,000 | ||
| Related party note payable | $ 2,000,000 | |||
| Area of real estate property | ft² | 3,282 | |||
| Affiliated Entity | ||||
| Related Party Transaction [Line Items] | ||||
| Repayments of related party note | $ 1,000,000 | |||
| Chief Executive Officer | Revolving Credit Facility | Line of Credit | ||||
| Related Party Transaction [Line Items] | ||||
| Maximum borrowing capacity | $ 1,000,000 | |||
| Annual interest rate | 6.00% | |||
| Board of Directors Chairman | Revolving Credit Facility | Line of Credit | ||||
| Related Party Transaction [Line Items] | ||||
| Line of credit outstanding | $ 0 | |||
| Chief Executive Officer | ||||
| Related Party Transaction [Line Items] | ||||
| Percentage of time spent by related parties | 60.00% | |||
| Board of Directors Chairman | ||||
| Related Party Transaction [Line Items] | ||||
| Officers' compensation | $ 1 | |||
| Percentage of time spent by related parties | 20.00% | |||
| Chief Financial Officer | ||||
| Related Party Transaction [Line Items] | ||||
| Percentage of time spent by related parties | 25.00% | 15.00% | ||
| Service Contracts | Tecogen | ||||
| Related Party Transaction [Line Items] | ||||
| Due to affiliate | $ 180,624 | |||
| Subsequent Events (Details) - USD ($) | May. 12, 2016 | May. 30, 2016 | Mar. 31, 2016 | Mar. 31, 2015 | May. 10, 2016 |
| Subsequent Event [Line Items] | |||||
| Amount of debt to be repaid with proceeds | $ 0 | $ 1,000,000 | |||
| Private Placement | Subsequent Event | |||||
| Subsequent Event [Line Items] | |||||
| Share Price | $ 0.575 | $ 0.575 | |||
| Stock subscriptions from investors | $ 7,250,000 | $ 7,250,000 | |||
| Scenario, Forecast | Private Placement | |||||
| Subsequent Event [Line Items] | |||||
| Maximum proceeds from private placement | 7,250,000 | $ 10,000,000 | |||
| Board of Directors Chairman | Scenario, Forecast | Private Placement | |||||
| Subsequent Event [Line Items] | |||||
| Amount of debt to be repaid with proceeds | $ 2,000,000 | $ 2,000,000 |
