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Income Taxes - Significant components of deferred taxes (Details) - USD ($) | Dec. 31, 2019 | Dec. 31, 2018
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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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