Note 4 - Receivables
|12 Months Ended|
Mar. 31, 2020
|Notes to Financial Statements|
|Loans, Notes, Trade and Other Receivables Disclosure [Text Block]||
The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses.
Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef