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Condensed Consolidated Statement of Comprehensive Income - USD ($)
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Details        
Net earnings $ 2,013,746 $ 1,096,838 $ 22,177,886 $ 5,442,702
Other comprehensive income:        
Unrealized gains on equity securities 0 144,381 0 106,543
Unrealized gains on derivative instruments 0 554 0 3,170
Foreign currency translation adjustments 1,013 0 (916) 0
Other comprehensive income, before income tax 1,013 144,935 (916) 109,713
Income tax expense (252) (50,517) 229 (37,904)
Other comprehensive income, net of income tax 761 94,418 (687) 71,809
Comprehensive income $ 2,014,507 $ 1,191,256 $ 22,177,199 $ 5,514,511