Note 14 - Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	Sep. 30, 2020	Mar. 31, 2020
Preconfirmation, Restricted Cash and Cash Equivalents, Current	$ 5.8	$ 0.5

Amount of current restricted cash and cash equivalents at the balance sheet date before fresh-start adjustments.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
-Paragraph 10
-URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 50
-Paragraph 7
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=120604989&loc=SL2890621-112765

Name:	us-gaap_PreconfirmationRestrictedCashAndCashEquivalentsCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant