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3. Investments (Details 4) - USD ($)	Mar. 31, 2019	Dec. 31, 2018
Amortized Cost	$ 3,824,620	$ 4,222,855
Estimated Fair Value	4,076,611	4,426,416
Less Than One Year [Member]
Amortized Cost	0	0
Estimated Fair Value	0	0
One To Five Years [Member]
Amortized Cost	2,598,323	2,996,685
Estimated Fair Value	2,676,159	3,036,531
Five To Ten Years [Member]
Amortized Cost	619,780	619,663
Estimated Fair Value	646,413	635,846
More Than 10 Years [Member]
Amortized Cost	606,517	606,507
Estimated Fair Value	$ 754,039	$ 754,039

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