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Intangible assets | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
Intangible Assets Disclosure [Text Block] | 10. Intangible assets In 2003, as part of the acquisition of a group of companies, the Company acquired 100% of the outstanding voting common shares of DesalCo, which had an agreement to provide management and engineering services to OC-BVI. The Company attributed $856,356 of the purchase price of the acquisition to the value of this management services agreement, which has no expiration term. Initially, the Company determined that this intangible asset had an indefinite life and therefore it was not amortized. However in 2010, as a result of the loss by OC-BVI of its Baughers Bay contract (see Note 8), the Company began amortizing this asset over the life of OC-BVI’s remaining seven-year water supply contract for its Bar Bay plant. The carrying amount of the Belize Water Production and Supply Agreement is being amortized over the 23-year term of the agreement that expires in March 2026. On February 11, 2016, the Company purchased a 51% ownership interest in Aerex Industries, Inc. The purchase transaction identified certain intangible assets with a fair value of $5,900,000 and useful life as follows: Non-Compete (5 years), Trade name (15 years), Certifications/programs (3 years), Customer backlog (1 year), and Customer relationships (4 years). See further discussion of this acquisition at Note 21.
|  | December 31, |
|  | 2017 |  | 2016 |
Cost |  |  |  |  |  |  |
Intangible asset management service agreement |  | $ | 856,356 |  | $ | 856,356 |
Belize water production and supply agreement |  |  | 1,522,419 |  |  | 1,522,419 |
Aerex - Non-compete agreement |  |  | 400,000 |  |  | 400,000 |
Aerex - Trade name |  |  | 1,400,000 |  |  | 1,400,000 |
Aerex - Certifications/programs |  |  | 2,000,000 |  |  | 2,000,000 |
Aerex - Customer backlog |  |  | 100,000 |  |  | 100,000 |
Aerex - Customer relationships |  |  | 2,000,000 |  |  | 2,000,000 |
|  |  | 8,278,775 |  |  | 8,278,775 |
Accumulated amortization |  |  |  |  |  |  |
Intangible asset management service agreement |  |  | (856,356) |  |  | (840,839) |
Belize water production and supply agreement |  |  | (988,652) |  |  | (922,460) |
Aerex - Non-compete agreement |  |  | (153,333) |  |  | (73,333) |
Aerex - Trade name |  |  | (178,889) |  |  | (85,556) |
Aerex - Certifications/programs |  |  | (1,277,778) |  |  | (611,111) |
Aerex - Customer backlog |  |  | (100,000) |  |  | (91,667) |
Aerex - Customer relationships |  |  | (958,333) |  |  | (458,333) |
|  |  | (4,513,341) |  |  | (3,083,299) |
Intangible assets, net |  | $ | 3,765,434 |  | $ | 5,195,476 |
Amortization of intangible assets for each of the next five years and thereafter is expected to be as follows:
2018 |  | $ | 1,406,192 |
2019 |  |  | 795,081 |
2020 |  |  | 281,192 |
2021 |  |  | 166,192 |
2022 |  |  | 159,525 |
Thereafter |  |  | 957,252 |
|  | $ | 3,765,434 |
Amortization expense was $1,430,042, $1,476,335, and $156,089 for the years ended December 31, 2017, 2016 and 2015, respectively.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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