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Convertible Preferred Stock - Voting Rights (Details)	Sep. 30, 2019 Vote director
Class of Stock [Line Items]
Number of directors who can be elected by each series of convertible preferred stock \| director	2
Number of directors who can be elected by common stock \| director	1
Series A Preferred Stock
Class of Stock [Line Items]
Number of votes per director \| Vote	2
Series B Preferred Stock
Class of Stock [Line Items]
Number of votes per director \| Vote	1