Quarterly report pursuant to Section 13 or 15(d)

Note 12 - Multi-employer Pension Plans (Details Textual)

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Note 12 - Multi-employer Pension Plans (Details Textual) - Merchant Navy Ratings Pension Fund [Member]
$ in Thousands, € in Millions
12 Months Ended
Sep. 30, 2019
USD ($)
Sep. 30, 2019
EUR (€)
Mar. 31, 2017
USD ($)
Mar. 31, 2017
EUR (€)
Multiemployer Plans, Cumulative Funding Deficit     $ 291,900 € 221.0
Scenario, Forecast [Member]        
Multiemployer Plan, Contributions by Employer $ 1,190 € 0.9