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Investments - Schedule of maturities (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Cost
Less than 1 year	$ 471,139
1 to 3 years	2,258,686
Total	2,729,825	$ 6,406,062
Fair Value
Less than 1 year	480,478
1 to 3 years	2,287,809
Total	$ 2,768,287	$ 6,349,915

X

- Definition

Amount after adjustments of available-for-sale debt securities at cost, maturing in the second fiscal year through the third fiscal year following the latest fiscal year. Adjustments include, but are not limited to, accretion, amortization, collection of cash, previous other-than-temporary impairments (OTTI) recognized in earnings less cumulative-effect adjustments, and fair value hedge accounting adjustments. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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Fair value of available-for-sale debt securities maturing in the second fiscal year through the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date.

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