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Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)	3 Months Ended				6 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020
Earnings Per Share [Abstract]
Net earnings	$ 11,257,479	$ 12,128,715	$ 20,557,047	$ 1,424,449	$ 23,386,194	$ 21,981,496
Basic weighted-average shares outstanding	20,106,954		19,719,792		20,093,834	19,658,351
Employee stock options	$ 784,817		$ 439,593		$ 826,048	$ 349,502
Diluted weighted-average shares outstanding	20,891,771		20,159,385		20,919,882	20,007,853
Basic net earnings per share	$ 0.56		$ 1.04		$ 1.16	$ 1.12
Diluted net earnings per share	$ 0.54		$ 1.02		$ 1.12	$ 1.10

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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=125511455&loc=d3e1448-109256

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