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Income Taxes - Significant components of deferred taxes (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Deferred income tax assets (liabilities):
Stock compensation	$ 790,357	$ 927,282
Deferred revenue	446,562	499,307
Reserves and allowances	257,549	197,355
Research and development credits carryforward	146,320	43,391
Net operating loss carryforward	688,084	26,767
Depreciation and amortization	(619,528)	(611,269)
Other, net	(45,929)	5,869
Total deferred income taxes, net	$ 1,663,415	$ 1,088,702

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