Professional and Legal Fees Related to the BW Proposal (Details)	3 Months Ended	6 Months Ended
	Sep. 30, 2018 USD ($)	Sep. 30, 2019 USD ($) item	Sep. 30, 2018 USD ($)
Professional and Legal Fees Related to the BW Proposal
Costs for professional (including investment banking fees) and legal services incurred in connection with BW’s unsolicited acquisition proposal and proxy contest	$ 1,770,589		$ 2,253,589
BW
Professional and Legal Fees Related to the BW Proposal
Number of directors proposed to be replaced in BW proposal | item		3
Costs for professional (including investment banking fees) and legal services incurred in connection with BW’s unsolicited acquisition proposal and proxy contest	$ 1,800,000	$ 0	$ 2,300,000