Income Taxes - Schedule of Components of Deferred Tax Assets and Liabilities (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Deferred tax assets:
Net operating loss carry forwards	$ 3,604,179	$ 1,843,000
Capitalized research and development costs	14,381,936	12,177,000
Accrued liabilities	232,899	25,000
Tax credit carryforwards	6,311,164	3,286,000
Stock-based compensation	394,918	116,000
Total deferred tax assets	24,925,096	17,447,000
Valuation allowance	(24,922,829)	(17,444,000)
Net deferred tax assets	2,267	3,000
Deferred tax liabilities	$ (2,267)	$ (3,000)