Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2019
Accounting Policies [Abstract]
Consolidation, Policy [Policy Text Block]	Consolidation CEN’s consolidated financial statements include the accounts of CEN, and Eastern Starr (collectively, the “Company”). CEN Holdings’ purpose was to ease and facilitate US banking transactions through March 2017. Eastern Starr’s purpose is to facilitate future growth opportunities in the LED lighting sector. All material intercompany transactions are eliminated in consolidation.
Basis of Accounting, Policy [Policy Text Block]	Basis of Accounting The Company’s consolidated financial statements are prepared using the accrual method of accounting in accordance with accounting principles generally accepted in the United States of America. The functional currency of the Company is the U.S. dollar.
Use of Estimates, Policy [Policy Text Block]	Use of Estimates and Assumptions The accompanying consolidated financial statements include certain estimates and assumptions which affect the reported amounts of assets and liabilities at the date of the financial statements (including intangible assets), and the reported amounts of expenses during the reporting period, including stock-based compensation. Accordingly, actual results may differ from those estimates.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash and Cash Equivalents For purposes of the balance sheet and statement of cash flows, the Company considers all highly liquid instruments with a maturity of three months or less at the time of issuance to be cash equivalents.
Property, Plant and Equipment, Policy [Policy Text Block]	Property, Plant and Improvements Property, plant and improvements are recorded at cost. Depreciation and amortization is provided using the straight-line method over the estimated useful lives or term of the assets, which is 10 years. The cost of asset additions and improvements that extend the useful lives of property, plant and improvements are capitalized. Routine maintenance and repair items are charged to current operations. The original cost and accumulated depreciation of asset dispositions are removed from the accounts and any gain or loss is reflected in the statement of operations in the period of disposition. The Company reviews long-lived assets to assess recoverability using undiscounted cash flows. When certain events or changes in operating or economic conditions occur, an impairment assessment is performed on the recoverability of the carrying value of these assets. If the asset is determined to be impaired, the loss is measured based on the difference between the asset's fair value and its carrying value. If quoted market prices are not available, Cen estimates fair value using a discounted value of estimated future cash flows.
Intangible Assets, Finite-Lived, Policy [Policy Text Block]	Intangible Assets Intangible assets include a patent with a definite useful life and is amortized over 16 years. Management annually reviews this asset for impairment when circumstances indicate the carrying amount of an asset may not be recoverable based on the undiscounted cash flows of the asset. If the carrying amount of an asset may not be recoverable, a write-down to fair value is recorded. Fair values are determined based on the discounted cash flows, or external appraisals, as applicable.
Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block]	Impairment of Long-Lived Assets A long-lived asset (asset group) shall be tested for recoverability whenever events or changes in circumstances indicate that its carrying amount may not be recoverable. See Note 6 for impairment charges taken in 2018 related to leasehold improvements. There were no impairment charges taken during the year ended December 31, 2019.
Research and Development Expense, Policy [Policy Text Block]	Research and Development Expenditures CEN expenses all research and development expenses when incurred. Research and development expenses were approximately $41,000 in 2018. There were no research and development expenses incurred in 2019.
Income Tax, Policy [Policy Text Block]	Income Taxes Deferred income tax assets and liabilities are computed annually for differences between the financial statement and income tax bases of assets and liabilities that will result in taxable or deductible amounts in the future, based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount expected to be realized. Income tax expense is the tax payable or refundable for the year plus or minus the change during the year in deferred tax assets and liabilities.
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Foreign Currency Transactions and Balances Foreign currency transactions in Canadian dollars are converted in the Company’s consolidated financial statements to U.S. dollars at the exchange rate prevailing at the date of the transaction. Monetary assets and liabilities denominated in foreign currencies are subsequently remeasured at the balance sheet date exchange rate into the functional currency. All gains and losses resulting from the settlement of foreign currency transactions and from the re-measurement of monetary assets and liabilities denominated in foreign currencies are included in the consolidated statements of operations.
Compensation Related Costs, Policy [Policy Text Block]	Stock-Based Compensation The fair value of restricted stock awards granted to employees and non-employees is determined on the grant date and compensation is recognized ratably over the requisite service period equal to the fair value of the award. The Company accounts for restricted stock awards issued to employees and non-employees in accordance with the authoritative guidance in ASC Topic 718, Compensation—Stock Compensation (ASC 718 ). ASC 718 requires all stock-based payments to employees, including grants of employee stock options and modifications to existing stock awards, to be recognized in the statements of operations and comprehensive loss based on their grant date fair values.
Earnings Per Share, Policy [Policy Text Block]	Loss per Share Net loss per common share is computed pursuant to ASC 260 - 10 - 45. Basic loss per share is computed based on the weighted average number of common shares outstanding during the period. Diluted net loss per share is calculated by dividing net loss by the diluted weighted average common shares outstanding, which includes the effect of potentially dilutive securities. During periods when there is a net loss, all potentially dilutive shares are anti-dilutive and are excluded from the calculation of net loss per share. Diluted earnings per share is similarly computed except that the denominator includes the effect, using the treasury stock method, of unvested restricted stock and convertible notes, if including such potential shares of common stock is dilutive. For 2019 and 2018, the common stock equivalents of the convertible note agreements were not included in diluted earnings per share computations because their effect was antidilutive.
Lessee, Leases [Policy Text Block]	Leases Effective January 1, 2019, the Company adopted Accounting Standards Update (“ASU”) No. 2016 - 02, “ Leases ”. This ASU requires substantially all leases be recorded on the balance sheet as right of use assets and lease obligations. The Company adopted the ASU using a modified retrospective adoption method at January 1, 2019, as outlined in ASU No. 2018 - 11, “ Leases - Targeted Improvements ”. Under this method of adoption, there is no impact to the comparative consolidated statement of operations and consolidated balance sheet. The Company determined that there was no cumulative-effect adjustment to beginning retained earnings on the consolidated balance sheet. In addition, the Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed carryforward of historical lease classifications. Adoption of this standard did not materially impact the Company’s results of operations and had no impact on the consolidated statement of cash flows.

Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2019

Consolidation, Policy [Policy Text Block]

Consolidation

CEN’s consolidated financial statements include the accounts of CEN, and Eastern Starr (collectively, the “Company”). CEN Holdings’ purpose was to ease and facilitate US banking transactions through

March 2017.

Eastern Starr’s purpose is to facilitate future growth opportunities in the LED lighting sector. All material intercompany transactions are eliminated in consolidation.

Basis of Accounting, Policy [Policy Text Block]

Basis of Accounting

The Company’s consolidated financial statements are prepared using the accrual method of accounting in accordance with accounting principles generally accepted in the United States of America. The functional currency of the Company is the U.S. dollar.

Use of Estimates, Policy [Policy Text Block]

Use of Estimates and Assumptions

The accompanying consolidated financial statements include certain estimates and assumptions which affect the reported amounts of assets and liabilities at the date of the financial statements (including intangible assets), and the reported amounts of expenses during the reporting period, including stock-based compensation. Accordingly, actual results

may

differ from those estimates.

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash and Cash Equivalents

For purposes of the balance sheet and statement of cash flows, the Company considers all highly liquid instruments with a maturity of

three

months or less at the time of issuance to be cash equivalents.

Property, Plant and Equipment, Policy [Policy Text Block]

Property, Plant and Improvements

Property, plant and improvements are recorded at cost. Depreciation and amortization is provided using the straight-line method over the estimated useful lives or term of the assets, which is

years.

The cost of asset additions and improvements that extend the useful lives of property, plant and improvements are capitalized. Routine maintenance and repair items are charged to current operations. The original cost and accumulated depreciation of asset dispositions are removed from the accounts and any gain or loss is reflected in the statement of operations in the period of disposition.

The Company reviews long-lived assets to assess recoverability using undiscounted cash flows. When certain events or changes in operating or economic conditions occur, an impairment assessment is performed on the recoverability of the carrying value of these assets. If the asset is determined to be impaired, the loss is measured based on the difference between the asset's fair value and its carrying value. If quoted market prices are

not

available, Cen estimates fair value using a discounted value of estimated future cash flows.

Intangible Assets, Finite-Lived, Policy [Policy Text Block]

Intangible Assets

Intangible assets include a patent with a definite useful life and is amortized over

years. Management annually reviews this asset for impairment when circumstances indicate the carrying amount of an asset

may

not

be recoverable based on the undiscounted cash flows of the asset. If the carrying amount of an asset

may

not

be recoverable, a write-down to fair value is recorded. Fair values are determined based on the discounted cash flows, or external appraisals, as applicable.

Impairment or Disposal of Long-Lived Assets, Including Intangible Assets, Policy [Policy Text Block]

Impairment of Long-Lived Assets

A long-lived asset (asset group) shall be tested for recoverability whenever events or changes in circumstances indicate that its carrying amount

may

not

be recoverable. See Note

for impairment charges taken in

2018

related to leasehold improvements. There were

impairment charges taken during the year ended

December 31, 2019.

Research and Development Expense, Policy [Policy Text Block]

Research and Development Expenditures

CEN expenses all research and development expenses when incurred. Research and development expenses were approximately

$41,000

2018.

There were

research and development expenses incurred in

2019.

Income Tax, Policy [Policy Text Block]

Income Taxes

Deferred income tax assets and liabilities are computed annually for differences between the financial statement and income tax bases of assets and liabilities that will result in taxable or deductible amounts in the future, based on enacted tax laws and rates applicable to the periods in which the differences are expected to affect taxable income. Valuation allowances are established, when necessary, to reduce deferred tax assets to the amount expected to be realized. Income tax expense is the tax payable or refundable for the year plus or minus the change during the year in deferred tax assets and liabilities.

Foreign Currency Transactions and Translations Policy [Policy Text Block]

Foreign Currency Transactions and Balances

Foreign currency transactions in Canadian dollars are converted in the Company’s consolidated financial statements to U.S. dollars at the exchange rate prevailing at the date of the transaction. Monetary assets and liabilities denominated in foreign currencies are subsequently remeasured at the balance sheet date exchange rate into the functional currency. All gains and losses resulting from the settlement of foreign currency transactions and from the re-measurement of monetary assets and liabilities denominated in foreign currencies are included in the consolidated statements of operations.

Stock-Based Compensation

The fair value of restricted stock awards granted to employees and non-employees is determined on the grant date and compensation is recognized ratably over the requisite service period equal to the fair value of the award.

The Company accounts for restricted stock awards issued to employees and non-employees in accordance with the authoritative guidance in ASC Topic

718,

Compensation—Stock Compensation (ASC

718

). ASC

718

requires all stock-based payments to employees, including grants of employee stock options and modifications to existing stock awards, to be recognized in the statements of operations and comprehensive loss based on their grant date fair values.

Earnings Per Share, Policy [Policy Text Block]

Loss per Share

Net loss per common share is computed pursuant to ASC

260

45.

Basic loss per share is computed based on the weighted average number of common shares outstanding during the period. Diluted net loss per share is calculated by dividing net loss by the diluted weighted average common shares outstanding, which includes the effect of potentially dilutive securities. During periods when there is a net loss, all potentially dilutive shares are anti-dilutive and are excluded from the calculation of net loss per share. Diluted earnings per share is similarly computed except that the denominator includes the effect, using the treasury stock method, of unvested restricted stock and convertible notes, if including such potential shares of common stock is dilutive. For

2019

and

2018,

the common stock equivalents of the convertible note agreements were

not

included in diluted earnings per share computations because their effect was antidilutive.

Lessee, Leases [Policy Text Block]

Leases

Effective

January 1, 2019,

the Company adopted Accounting Standards Update (“ASU”)

No.

2016

02,

“

Leases

”. This ASU requires substantially all leases be recorded on the balance sheet as right of use assets and lease obligations. The Company adopted the ASU using a modified retrospective adoption method at

January 1, 2019,

as outlined in ASU

No.

2018

11,

“

Leases - Targeted Improvements

”. Under this method of adoption, there is

impact to the comparative consolidated statement of operations and consolidated balance sheet. The Company determined that there was

cumulative-effect adjustment to beginning retained earnings on the consolidated balance sheet. In addition, the Company elected the package of practical expedients permitted under the transition guidance within the new standard, which among other things, allowed carryforward of historical lease classifications. Adoption of this standard did

not

materially impact the Company’s results of operations and had

impact on the consolidated statement of cash flows.