Summary of Significant Accounting and Reporting Policies (Schedule of Amortized Cost, Unrealized Gains and Losses, and Market Value of Investment Securities) (Details) - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Cost	$ 195,025,034	$ 177,467,550
Unrealized gains	3,093,114	8,260,042
Unrealized losses	(1,818,868)	(561,300)
Market Value	196,299,280	185,166,292
Certificate of Deposit \| Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Cost	1,500,543	1,502,187
Unrealized gains	7,227	14,506
Unrealized losses	0	0
Market Value	1,507,770	1,516,693
Certificate of Deposit \| Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Cost	2,001,714	3,503,898
Unrealized gains	54,996	141,622
Unrealized losses	0	0
Market Value	2,056,710	3,645,520
Asset-backed Securities \| Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Cost	26,352,630	37,681,113
Unrealized gains	34,771	800,802
Unrealized losses	(587,888)	(557,378)
Market Value	25,799,513	37,924,537
Corporate Bonds \| Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Cost	1,994,639	7,084,638
Unrealized gains	23,801	70,962
Unrealized losses	0	0
Market Value	2,018,440	7,155,600
Corporate Bonds \| Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Cost	40,716,866	8,595,020
Unrealized gains	168,416	429,015
Unrealized losses	(530,353)	0
Market Value	40,354,929	9,024,035
Government Securities \| Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Cost		6,635,132
Unrealized gains		43,318
Unrealized losses		0
Market Value		6,678,450
Government Securities \| Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Cost	48,385,672
Unrealized gains	55,939
Unrealized losses	(497,575)
Market Value	47,944,036
Municipal Bonds \| Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Cost		10,160,376
Unrealized gains		124,389
Unrealized losses		0
Market Value		10,284,765
Municipal Bonds \| Long-term Investments
Debt Securities, Available-for-sale [Line Items]
Cost	72,175,568	100,776,325
Unrealized gains	2,747,964	6,635,428
Unrealized losses	(203,052)	(3,922)
Market Value	74,720,480	107,407,831
Other \| Short-term Investments
Debt Securities, Available-for-sale [Line Items]
Cost	1,897,402	1,528,861
Unrealized gains	0	0
Unrealized losses	0	0
Market Value	$ 1,897,402	$ 1,528,861

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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