Significant Accounting Policies (Policies)	6 Months Ended
Jun. 30, 2021
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	*Basis of presentation* The accompanying unaudited financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such rules and regulations. Intercompany items have been eliminated in consolidation. These condensed consolidated financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, and filed with the Securities and Exchange Commission. Management believes that the information furnished includes all adjustments of a normal recurring nature that are necessary to fairly present our consolidated financial position, results of operations and cash flows for the periods indicated. The results of operations for any interim period are not necessarily indicative of results to be expected for the full year. We refer to the condensed consolidated financial statements collectively as “financial statements,” and individually as “statements of comprehensive income,” “balance sheets,” “statements of shareholders’ equity,” and “statements of cash flows” herein.
New Accounting Pronouncements, Policy [Policy Text Block]	*Recent Accounting Pronouncements* We consider the applicability and impact of all Accounting Standard Updates (“ASUs”). ASUs not listed below were assessed and determined to be not applicable. Recently Adopted Accounting Pronouncements In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting of Income Taxes”, which is intended to simplify various aspects related to accounting for income taxes. ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. On January 1, 2021, the Company adopted this standard on a prospective basis. The Company’s adoption of this standard did not have a material impact on its financial statements. Recently Issued Accounting Pronouncements Not* Yet Adopted* In June 2016, the FASB issued ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326).” The update changes the impairment model for most financial assets and certain other instruments, including trade and other receivables, held-to-maturity debt securities and loans, and requires entities to use a new forward-looking expected loss model that will result in the earlier recognition of allowance for losses. In February 2020, the FASB issued ASU 2020-2, “Financial Instruments – Credit Losses (Topic 326) and Leases (Topic 842): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 119 and Update to SEC Section on Effective Date Related to Accounting Standards Update No. 2016-02, Leases (Topic 842).” The update delayed the effective date of ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326)” for Smaller Reporting Companies until fiscal years beginning after December 15, 2022. Adoption will require a modified retrospective approach beginning with the earliest period presented. The Company is currently evaluating the potential impact this standard will have on its financial statements. In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” This update provides optional guidance for a limited period of time to ease potential accounting impacts associated with transitioning away from reference rates that are expected to be discontinued, such as interbank offered rates and LIBOR. This guidance includes practical expedients for contract modifications due to reference rate reform. Generally, contract modifications related to reference rate reform may be considered an event that does not require remeasurement or reassessment of a previous accounting determination at the modification date. This guidance may be applied through December 31, 2022. The Company will apply this guidance to transactions and modifications to contracts and hedging relationships that reference LIBOR.

Significant Accounting Policies (Policies)

6 Months Ended

Jun. 30, 2021

Basis of Accounting, Policy [Policy Text Block]

Basis of presentation

The accompanying unaudited financial statements have been prepared pursuant to the rules and regulations of the Securities and Exchange Commission. Certain information and footnote disclosures normally included in financial statements prepared in accordance with accounting principles generally accepted in the United States of America have been condensed or omitted pursuant to such rules and regulations. Intercompany items have been eliminated in consolidation. These condensed consolidated financial statements should be read in conjunction with the audited financial statements and notes thereto included in the Company’s Annual Report on Form 10-K for the year ended December 31, 2020, and filed with the Securities and Exchange Commission. Management believes that the information furnished includes all adjustments of a normal recurring nature that are necessary to fairly present our consolidated financial position, results of operations and cash flows for the periods indicated. The results of operations for any interim period are not necessarily indicative of results to be expected for the full year.

We refer to the condensed consolidated financial statements collectively as “financial statements,” and individually as “statements of comprehensive income,” “balance sheets,” “statements of shareholders’ equity,” and “statements of cash flows” herein.

New Accounting Pronouncements, Policy [Policy Text Block]

Recent Accounting Pronouncements

We consider the applicability and impact of all Accounting Standard Updates (“ASUs”). ASUs not listed below were assessed and determined to be not applicable.

Recently Adopted Accounting Pronouncements

In December 2019, the FASB issued ASU 2019-12, “Income Taxes (Topic 740): Simplifying the Accounting of Income Taxes”, which is intended to simplify various aspects related to accounting for income taxes. ASU 2019-12 removes certain exceptions to the general principles in Topic 740 and also clarifies and amends existing guidance to improve consistent application. On January 1, 2021, the Company adopted this standard on a prospective basis. The Company’s adoption of this standard did not have a material impact on its financial statements.

Recently Issued Accounting Pronouncements Not Yet Adopted

In June 2016, the FASB issued ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326).” The update changes the impairment model for most financial assets and certain other instruments, including trade and other receivables, held-to-maturity debt securities and loans, and requires entities to use a new forward-looking expected loss model that will result in the earlier recognition of allowance for losses. In February 2020, the FASB issued ASU 2020-2, “Financial Instruments – Credit Losses (Topic 326) and Leases (Topic 842): Amendments to SEC Paragraphs Pursuant to SEC Staff Accounting Bulletin No. 119 and Update to SEC Section on Effective Date Related to Accounting Standards Update No. 2016-02, Leases (Topic 842).” The update delayed the effective date of ASU 2016-13, “Financial Instruments—Credit Losses (Topic 326)” for Smaller Reporting Companies until fiscal years beginning after December 15, 2022. Adoption will require a modified retrospective approach beginning with the earliest period presented. The Company is currently evaluating the potential impact this standard will have on its financial statements.

In March 2020, the FASB issued ASU 2020-04, “Reference Rate Reform (Topic 848) Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” This update provides optional guidance for a limited period of time to ease potential accounting impacts associated with transitioning away from reference rates that are expected to be discontinued, such as interbank offered rates and LIBOR. This guidance includes practical expedients for contract modifications due to reference rate reform. Generally, contract modifications related to reference rate reform may be considered an event that does not require remeasurement or reassessment of a previous accounting determination at the modification date. This guidance may be applied through December 31, 2022. The Company will apply this guidance to transactions and modifications to contracts and hedging relationships that reference LIBOR.