Income Taxes - Components of current and deferred federal and state income tax (benefits) provision (Details) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Mar. 31, 2018
Components of income tax (benefit) expense
Loss from continuing operations before income taxes	$ (5,450)	$ (7,780)	$ (5,586)
Current income tax provision:
Federal			3
State	34	36	45
Total current tax provision	34	36	48
Deferred income tax benefit:
Federal	105		(1,849)
State	21		(17)
Total deferred benefit provision	126		(1,866)
Provision (benefit) for income taxes on continued operations	160	36	(1,818)
Loss from continuing operations, net of taxes	$ (5,610)	$ (7,816)	$ (3,768)