Income Taxes (Details 2)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Income Taxes (Details 2)
Statutory rate differential - domestic versus foreign	0.20%	4.30%
Tax expense at the federal statutory rate	21.00%	21.00%
State taxes, net of federal benefit	11.70%	11.30%
Permanent differences - change in fair value of derivatives	1.10%	7.40%
Permanent differences - Warrant modification expense	2.20%	0.00%
Permanent differences - Loss on exchange of notes payable for preferred stock	2.00%	2.90%
Permanent differences - Gain on forgiveness of debt	0.30%	0.00%
Permanent differences - other	0.00%	0.20%
Research and development tax credits	4.60%	0.00%
Other	0.00%	1.20%
Change in valuation allowance	34.70%	33.90%
Effective income tax rate	0.00%	0.00%