Significant Accounting Policies (PPE) (Details)	12 Months Ended
	Mar. 31, 2020 item
Segment reporting:
Number of reportable segments	1
Vessels
Vessels, Net
Useful life of vessels	25 years
Initial drydocking period	5 years
Number of years for initial drydocking requirement	15 years
Drydocking period if extension granted	7 years 6 months
Maximum age of vessel for extension of drydocking period	20 years