Nature of Business	6 Months Ended
Jun. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Nature of Business	1. Nature of Business Ethema Health Corporation (the “Company”) was incorporated under the laws of the state of Colorado, USA, on April 1, 1993. Effective April 4, 2017, the Company changed its name to Ethema Health Corporation and prior to that, on May 2012, the Company had changed its name to GreeneStone Healthcare Corporation from Nova Natural Resources Corporation. As of December 31, 2017, the Company owned 100% of the outstanding shares of GreeneStone Clinic Muskoka Inc., incorporated in 2010 under the laws of the Province of Ontario, Canada; Cranberry Cove Holdings Ltd., incorporated on January 9, 2004 under the laws of the Province of Ontario, Canada. and Seastone Delray Healthcare, LLC, incorporated on May 17, 2016 under the laws of Florida, USA; and Delray Andrews RE, LLC, incorporated on May 17, 2016 under the laws of Florida, USA. During December 2016, the Company obtained a license to operate and provide addiction treatment healthcare services in Florida, USA. The company commenced operations under this license with effect from January 2017. On February 14, 2017, the Company completed a series of transactions (referred to collectively as the “Restructuring Transactions”), including a Share Purchase Agreement (the “SPA”) whereby the Company acquired 100% of the stock of CCH, which holds the real estate on which the Company previously operated a rehabilitation clinic (“the Canadian Rehab Clinic”). The Company entered into an Asset Purchase Agreement (the “APA”) and lease (the “Lease”) whereby the Company sold all of the Canadian Rehab Clinic business assets and leased the real estate to the buyer. Simultaneously with this transaction, the Company entered into a Real Estate \Purchase agreement and Asset Purchase Agreement whereby the Company purchased the real estate and business assets of Seastone Delray (the “Florida Purchase”). *The Share Purchase Agreement* Under the SPA, the Company acquired 100% of the stock of CCH from Leon Developments Ltd. (“Leon Developments”), a company wholly owned by Shawn E. Leon, who is the President, CEO, and CFO of the Company (“Mr. Leon”). CCH owns the real estate on which the Canadian Rehab Clinic is located. The total consideration paid by the Company was CDN$3,517,062, including the assumption of certain liabilities of CCH, which was funded by the assignment to Leon Developments of certain indebtedness owing to the Company in the amount of CDN$659,918, and the issuance of 60,000,000 shares of the Company’s common stock to Leon Developments, valued at US$0.0364 per share. *The Asset Purchase Agreement and Lease* Under the APA, the assets of the Canadian Rehab Clinic were sold by the Company, through its subsidiary, GreeneStone Clinic Muskoka Inc. (“Muskoka”), to Canadian Addiction Residential Treatment LP (the “Purchaser”), for a total consideration of CDN$10,000,000, plus an additional performance payment of up to CDN$3,000,000 as a performance payment to be received in 2019 if certain clinic performance metrics are met. The Purchaser completed the sale with cash proceeds to the Company of CDN$10,000,000, of which CDN$1,500,000 will remain in escrow for up to two years to cover indemnities given by the Company. The proceeds of the Muskoka clinic asset sale were used to pay down certain tax debts and operational costs of the Company and to fund the Florida Purchase, mentioned below. Through the APA, substantially all of the assets of the Canadian Rehab Clinic were sold, leaving Ethema with only the underlying clinic real estate, which the Company, through its newly acquired subsidiary, CCH concurrently leased to the Purchaser. The Lease is a triple net lease and provides for a five (5) year primary term with three (3) five-year renewal options, annual base rent for the first year at CDN$420,000 with annual increases, an option to tenant to purchase the leased premises and certain first refusal rights. *The Florida Purchase* Immediately after closing on the sale of the assets of the Canadian Rehab Clinic, the Company closed on the acquisition of the real estate assets of Seastone Delray pursuant to certain real estate and asset purchase agreements. The purchase price for the Seastone assets was US$6,070,000 financed with a purchase money mortgage of US$3,000,000, and US$3,070,000 in cash. On November 2, 2017, the Company entered into an Agreement of Purchase and Sale (the “Agreement”) to purchase from AREP 5400 East Avenue LLC, a Delaware limited liability company (“Seller”) certain buildings in West Palm Beach, Florida, totaling approximately 80,000 square feet, on which the present tenant operates a substance abuse treatment center (the “Property”). The purchase price of the Property is $20,530,000, and the Company made nonrefundable down payments totaling $2,549,955 as of June 30, 2018. On May 23, 2018, the Company converted the agreement to purchase AREP 5400 East Avenue LLC. ("the landlord") into a lease agreement with a purchase option of $17,250,000, increasing August 31, 2018 by $750,000 per month until the purchase option is exercised. The premises is located at 5400, 5402 and 5410 East Avenue, West Palm Beach, Florida (the "Property"). The lease is for an initial 10 years and provides for two additional 10 year extensions. The Company was previously under agreement to purchase the Property from the Landlord. The Property is presently used as a rehabilitation treatment center. The current tenant at the property, Alternatives in Treatment, LLC, a Florida limited liability company, consented to the Lease and concurrent with the execution of the Lease entered into a Sublease Agreement with the Company. 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 consolidated financial information and Rule 8-03 of Regulation SX. Accordingly, these unaudited condensed consolidated financial statements do not include all the information and disclosures required by accounting principles generally accepted in the United States of America for complete financial statements. All adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included in these unaudited condensed consolidated financial statements. Operating results for the three and six month period presented are not necessarily indicative of the results that may be expected for any other interim period or for the full year. The balance sheet at December 31, 2017 has been derived from audited consolidated financial statements. The unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and footnotes thereto for the year ended December 31, 2017.

Nature of Business

6 Months Ended

Jun. 30, 2018

Organization, Consolidation and Presentation of Financial Statements [Abstract]

1. Nature of Business

Ethema Health Corporation (the “Company”) was incorporated under the laws of the state of Colorado, USA, on April 1, 1993. Effective April 4, 2017, the Company changed its name to Ethema Health Corporation and prior to that, on May 2012, the Company had changed its name to GreeneStone Healthcare Corporation from Nova Natural Resources Corporation. As of December 31, 2017, the Company owned 100% of the outstanding shares of GreeneStone Clinic Muskoka Inc., incorporated in 2010 under the laws of the Province of Ontario, Canada; Cranberry Cove Holdings Ltd., incorporated on January 9, 2004 under the laws of the Province of Ontario, Canada. and Seastone Delray Healthcare, LLC, incorporated on May 17, 2016 under the laws of Florida, USA; and Delray Andrews RE, LLC, incorporated on May 17, 2016 under the laws of Florida, USA.

During December 2016, the Company obtained a license to operate and provide addiction treatment healthcare services in Florida, USA. The company commenced operations under this license with effect from January 2017.

On February 14, 2017, the Company completed a series of transactions (referred to collectively as the “Restructuring Transactions”), including a Share Purchase Agreement (the “SPA”) whereby the Company acquired 100% of the stock of CCH, which holds the real estate on which the Company previously operated a rehabilitation clinic (“the Canadian Rehab Clinic”). The Company entered into an Asset Purchase Agreement (the “APA”) and lease (the “Lease”) whereby the Company sold all of the Canadian Rehab Clinic business assets and leased the real estate to the buyer. Simultaneously with this transaction, the Company entered into a Real Estate \Purchase agreement and Asset Purchase Agreement whereby the Company purchased the real estate and business assets of Seastone Delray (the “Florida Purchase”).

The Share Purchase Agreement

Under the SPA, the Company acquired 100% of the stock of CCH from Leon Developments Ltd. (“Leon Developments”), a company wholly owned by Shawn E. Leon, who is the President, CEO, and CFO of the Company (“Mr. Leon”). CCH owns the real estate on which the Canadian Rehab Clinic is located. The total consideration paid by the Company was CDN$3,517,062, including the assumption of certain liabilities of CCH, which was funded by the assignment to Leon Developments of certain indebtedness owing to the Company in the amount of CDN$659,918, and the issuance of 60,000,000 shares of the Company’s common stock to Leon Developments, valued at US$0.0364 per share.

The Asset Purchase Agreement and Lease

Under the APA, the assets of the Canadian Rehab Clinic were sold by the Company, through its subsidiary, GreeneStone Clinic Muskoka Inc. (“Muskoka”), to Canadian Addiction Residential Treatment LP (the “Purchaser”), for a total consideration of CDN$10,000,000, plus an additional performance payment of up to CDN$3,000,000 as a performance payment to be received in 2019 if certain clinic performance metrics are met. The Purchaser completed the sale with cash proceeds to the Company of CDN$10,000,000, of which CDN$1,500,000 will remain in escrow for up to two years to cover indemnities given by the Company. The proceeds of the Muskoka clinic asset sale were used to pay down certain tax debts and operational costs of the Company and to fund the Florida Purchase, mentioned below.

Through the APA, substantially all of the assets of the Canadian Rehab Clinic were sold, leaving Ethema with only the underlying clinic real estate, which the Company, through its newly acquired subsidiary, CCH concurrently leased to the Purchaser. The Lease is a triple net lease and provides for a five (5) year primary term with three (3) five-year renewal options, annual base rent for the first year at CDN$420,000 with annual increases, an option to tenant to purchase the leased premises and certain first refusal rights.

The Florida Purchase

Immediately after closing on the sale of the assets of the Canadian Rehab Clinic, the Company closed on the acquisition of the real estate assets of Seastone Delray pursuant to certain real estate and asset purchase agreements. The purchase price for the Seastone assets was US$6,070,000 financed with a purchase money mortgage of US$3,000,000, and US$3,070,000 in cash.

On November 2, 2017, the Company entered into an Agreement of Purchase and Sale (the “Agreement”) to purchase from AREP 5400 East Avenue LLC, a Delaware limited liability company (“Seller”) certain buildings in West Palm Beach, Florida, totaling approximately 80,000 square feet, on which the present tenant operates a substance abuse treatment center (the “Property”). The purchase price of the Property is $20,530,000, and the Company made nonrefundable down payments totaling $2,549,955 as of June 30, 2018.

On May 23, 2018, the Company converted the agreement to purchase AREP 5400 East Avenue LLC. ("the landlord") into a lease agreement with a purchase option of $17,250,000, increasing August 31, 2018 by $750,000 per month until the purchase option is exercised. The premises is located at 5400, 5402 and 5410 East Avenue, West Palm Beach, Florida (the "Property"). The lease is for an initial 10 years and provides for two additional 10 year extensions.

The Company was previously under agreement to purchase the Property from the Landlord. The Property is presently used as a rehabilitation treatment center. The current tenant at the property, Alternatives in Treatment, LLC, a Florida limited liability company, consented to the Lease and concurrent with the execution of the Lease entered into a Sublease Agreement with the Company.

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 consolidated financial information and Rule 8-03 of Regulation SX. Accordingly, these unaudited condensed consolidated financial statements do not include all the information and disclosures required by accounting principles generally accepted in the United States of America for complete financial statements.

All adjustments (consisting of normal recurring adjustments) considered necessary for a fair presentation have been included in these unaudited condensed consolidated financial statements. Operating results for the three and six month period presented are not necessarily indicative of the results that may be expected for any other interim period or for the full year. The balance sheet at December 31, 2017 has been derived from audited consolidated financial statements. The unaudited condensed consolidated financial statements should be read in conjunction with the consolidated financial statements and footnotes thereto for the year ended December 31, 2017.