Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2019

Accounting Policies [Abstract]

Potentially Dilutive Securities Excluded from Computation of Diluted Weighted-Average Shares

Outstanding potential Common Stock equivalents excluded from the calculation of diluted earnings per share because the effect would have been anti-dilutive were as follows:

	Year Ended December 31,		Six Months Ended December 31,		Year Ended June 30,
	2019		2018		2018		2017
Stock options		10,909,800		8,139,377		7,750,244		6,895,685
ESPP		137,368		—		—		—
Warrants		486,812		486,812		20,671,036		623,605
Restricted stock units		786,899		1,090,213		1,398,129		948,500
Performance stock units		—		370,000		466,668		210,000
Deferred stock units		—		35,418		35,001		—
		12,320,879		10,121,820		30,321,078		8,677,790