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Income Taxes (Details 2) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016
Deferred Tax Assets: |  |
Net operating loss carryforwards | $ 2,588,641 | $ 2,742,397
Stock-based compensation | 347,977 | 333,066
Research & development tax credits | 526,134 | 201,840
Intangible assets | 364,508 | 234,183
Gross deferred tax assets | 3,827,260 | 3,511,486
Valuation allowance | (3,827,260) | (3,511,486)
Deferred tax assets, net of valuation allowance | 0 | 0
Changes in valuation allowance | $ 315,774 | $ 1,439,452

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