Income Taxes - Schedule of Reconciliation between Statutory Federal Income Tax Rate and Effective Tax Rate (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Disclosure [Abstract]
Federal statutory income tax rate	21.00%	21.00%	34.00%
State taxes (tax effected)	7.30%	8.60%	7.10%
Non-deductible expenses and other	(0.50%)	2.50%	2.00%
Research and development reimbursements	3.20%	5.90%	6.00%
Change in valuation allowance	(31.00%)	(38.00%)	(24.00%)
Tax Act – net deferred tax rate change			(25.10%)
Total	0.00%	0.00%	0.00%