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Earnings Per Share: Share-based Payment Arrangement, Option, Activity (Details) - USD ($)	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020	Dec. 31, 2019
Common Class A [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Common Stock, Shares, Outstanding	17,561,521	16,557,554	16,595,783	16,107,779
Exercise of stock options	80,948	33,774
Dividends	$ 836,263	$ 404,839
Conversion of Class C to Class A	48,527	11,162
Common Class C [Member]
Earnings Per Share, Basic, by Common Class, Including Two Class Method [Line Items]
Common Stock, Shares, Outstanding	2,762,630	2,551,445	2,679,603	2,500,887
Exercise of stock options	0	0
Dividends	$ 131,554	$ 61,720
Conversion of Class C to Class A	(48,527)	(11,162)

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Total number of shares of other common stock instruments held by shareholders, such as exchangeable shares. May be all or portion of the number of common shares authorized.

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The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Number of share options (or share units) exercised during the current period.

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