Nature of Organization (Planned Principal Operations Have Not Commenced) (Details) - USD ($)		1 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2017	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Write-off of supplies for clinical trials			$ 2,349,404		$ 2,349,404	$ 0
Research and development	$ 3,000,000		10,353,601	$ 4,433,222	15,039,321	9,170,797
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Credit to income for forgiveness of debt			7,719,440	$ 0	7,719,440	0
Deposits reclassified to other current assets					1,922,218	$ 0
Accumulated deficit	$ 105,657,577	$ 105,657,577	$ 105,657,577		$ 105,657,577		$ 96,223,442
California Institute of Regenerative Medicine
Collaborative Arrangements and Non-collaborative Arrangement Transactions [Line Items]
Credit to income for forgiveness of debt		$ 7,719,440