Income Taxes - Additional Information (Detail) - USD ($)	12 Months Ended
	Mar. 31, 2021	Mar. 31, 2020	Mar. 31, 2019
Income Taxes [Line items]
Statutory standard corporate income tax rate	25.00%
Reduction or reversal of deferred tax assets		$ 310,000	$ (44,000)
Provision for income taxes	$ 1,926,000	661,000	44,000
Current tax accrual		293,000
Additional deferred tax expense	1,200,000
Net operating loss carry forwards	287,136,000
Net operating loss carry forwards, subject to expiration	$ 22,370,000
Net operating loss carry forwards expiration year, beginning	2022
Net operating loss carry forwards expiration year, ending	2028
Corporate income tax rate	25.00%
Deferred tax expense	$ 576,000
Unrecognized benefit	1,216,000	1,216,000	0
Interest expense carryforward, disqualified as interest expense	613,000
Impact of reassessment of transfer pricing policies	603,000
Unrecognized tax benefits, Income tax penalties and interest accrued	0	$ 0	$ 0
Tax charge on other comprehensive loss	$ 0
Jersey Taxing Authority [Member]
Income Taxes [Line items]
Statutory standard corporate income tax rate	0.00%
Corporate income tax rate	0.00%