Stockholders' Equity (Details 5) - USD ($)	6 Months Ended		12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Jun. 30, 2019	Jun. 30, 2018
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 2,367,000	$ 415,800	$ 1,214,000	$ 518,000
Research and development [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	174,500	29,500	215,900	62,500
General and administrative [Member]
Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-based compensation expense	$ 2,192,500	$ 386,300	$ 998,100	$ 455,500