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Consolidated Statements of Comprehensive Income - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Condensed Consolidated Statements Of Comprehensive Loss Income [Abstract] |  |
Net income | $ 5,513,608 | $ 4,598,350
Other comprehensive gain (loss) - |  |
Foreign currency translation | 45,223 | (461,374)
Change in net prior service credit and actuarial gains, net of income tax expense | 143,906 | 37,388
Total other comprehensive income (loss) | 189,129 | (423,986)
Comprehensive income | $ 5,702,737 | $ 4,174,364

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