Condensed Statements of Cash Flows (Liquidation Basis) - Liquidation Basis of Accounting [Member] - USD ($) $ in Thousands	3 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash flows from (used in) operating activities
Cash receipts from interest and dividends	$ 2,501	$ 946
Cash paid for professional fees, governance costs and other administrative costs	(3,896)	(3,210)
Cash paid for Residual Wind-Down Claims and Costs		(11,544)
Cash receipts for refunds	7	193
Cash paid for distributions	(3)
Net cash flows used in operating activities	(1,391)	(13,615)
Cash flows from (used in) investing activities
Cash used to purchase marketable securities	(1,150,111)	(1,176,908)
Cash from maturities and sales of marketable securities	1,151,329	1,189,519
Net cash flows from investing activities	1,218	12,611
Net decrease in cash and cash equivalents	(173)	(1,004)
Cash and cash equivalents, beginning of period	2,563	4,320
Cash and cash equivalents, end of period	$ 2,390	$ 3,316