Net Assets in Liquidation - Allowed and Disputed General Unsecured Claims and Potential Term Loan Avoidance Action Claims (Detail) - USD ($) $ in Thousands	12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Loss Contingencies [Line Items]
Beginning balance	$ 33,400,275	$ 33,400,418
New Allowed General Unsecured Claims	231,000	0
Disputed General Unsecured Claims resolved or disallowed	(50,000)	0
Term Loan Avoidance Action Claims resolved or disallowed	(1,494,843)	(143)
Ending balance	32,086,432	33,400,275
Allowed General Unsecured Claims [Member]
Loss Contingencies [Line Items]
Beginning balance	31,855,432	31,855,432
New Allowed General Unsecured Claims	231,000	0
Disputed General Unsecured Claims resolved or disallowed	0	0
Term Loan Avoidance Action Claims resolved or disallowed	0	0
Ending balance	32,086,432	31,855,432
Disputed General Unsecured Claims [Member]
Loss Contingencies [Line Items]
Beginning balance	50,000	50,000
New Allowed General Unsecured Claims	0	0
Disputed General Unsecured Claims resolved or disallowed	(50,000)	0
Term Loan Avoidance Action Claims resolved or disallowed	0	0
Ending balance	0	50,000
Term Loan Avoidance Action Claims [Member]
Loss Contingencies [Line Items]
Beginning balance	1,494,843	1,494,986
New Allowed General Unsecured Claims	0	0
Disputed General Unsecured Claims resolved or disallowed	0	0
Term Loan Avoidance Action Claims resolved or disallowed	(1,494,843)	(143)
Ending balance	0	1,494,843
Maximum Amount of Unresolved Claims [Member]
Loss Contingencies [Line Items]
Beginning balance	1,544,843	1,544,986
New Allowed General Unsecured Claims	0	0
Disputed General Unsecured Claims resolved or disallowed	(50,000)	0
Term Loan Avoidance Action Claims resolved or disallowed	(1,494,843)	(143)
Ending balance	$ 0	$ 1,544,843