Professional and Legal Fees Related to the BW Proposal (Details)	3 Months Ended	9 Months Ended
	Dec. 31, 2018 USD ($)	Dec. 31, 2018 USD ($) item
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	$ 7,766,847	$ 10,020,436
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	$ 7,800,000	$ 10,000,000