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Organization and Summary of Significant Accounting Policies - Research and Development Costs (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Accounting Policies [Abstract]
Outside contracted services	$ 585,487	$ 469,557
Contracted services - related party	389,473	392,549
Personnel related costs	94,762	94,991
Facilities, overhead and other	12,121	12,336
Research and development expense, related party, net	$ 1,081,843	$ 969,433