Income Taxes (Details) - USD ($) $ in Thousands	1 Months Ended	3 Months Ended		12 Months Ended
	Mar. 31, 2013	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Income Tax Expense (Benefit) [Abstract]
Income tax expense		$ 1	$ 1
Paid federal income taxes attributable to alternative minimum tax rate	$ 501
Alternative Minimum Tax (AMT) Credit Carryforward [Member] | Federal [Member]
Income Tax Expense (Benefit) [Abstract]
Income tax refund received				$ 10,700