6) Earnings Per Share: Schedule of Earnings Per Share, Basic and Diluted (Details) - USD ($)	3 Months Ended						9 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Details
Net earnings	$ 3,617,414	$ 3,480,054	$ 1,930,318	$ 2,013,746	$ 3,238,217	$ 16,925,923	$ 9,027,786	$ 22,177,886
Weighted Average Number of Shares Outstanding, Basic	17,230,987			17,152,656			17,240,745	17,072,531
GrantOfEmployeeStockOptions	$ 189,744			$ 234,670			$ 194,010	$ 222,771
Diluted weighted-average shares outstanding	17,420,731			17,387,326			17,434,755	17,295,302
Earnings Per Share, Basic	$ 0.21			$ 0.12			$ 0.52	$ 1.30
Earnings Per Share, Diluted	$ 0.21			$ 0.12			$ 0.52	$ 1.28