Income Taxes-Effective Income Tax Rate Reconciliation (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Effective Income Tax Rate Reconciliation, Amount
Statutory Federal income tax expense (benefit), Amount	$ (818)	$ (1,139)
State and local income tax, net of Federal tax benefit, Amount	(70)	(719)
Impact of income tax rate changes, Amount	(25)	186
Change in Valuation Allowance, Amount	917	1,661
Other, Amount	(4)	11
Income Tax Expense (Benefit)	$ 0	$ 0
Effective Income Tax Rate Reconciliation, Percent
Statutory Federal income tax expense (benefit), Percent	21.00%	21.00%
State and local income tax, net of Federal tax benefit, Percent	12.00%	13.20%
Impact of income tax rate changes, Percent	0.60%	(3.40%)
Change in Valuation Allowance, Percent	(33.50%)	(30.60%)
Other, Percent	(0.10%)	(0.20%)
Income tax expense (benefit), Percent	0.00%	0.00%