Consolidated Statements of Earnings and Comprehensive Earnings (Loss) (Parentheticals) - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Consolidated Statements of Earnings and Comprehensive Earnings (Loss) [Abstract]
Unrealized holding gains (losses) arising during the period, tax	$ (810,701)	$ 706,378
Reclassification adjustment for (gains) included in net income, tax	$ 201,561	$ 342,469

Amount, after reclassification adjustment, of tax expense (benefit) of gain (loss) from increase (decrease) in instrument-specific credit risk of financial liability measured under fair value option.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 10A
-Subparagraph (l)
-URI http://asc.fasb.org/extlink&oid=114867106&loc=SL7669646-108580

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=114867106&loc=d3e640-108580

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=75026489&loc=SL75136633-108610

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