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Note 12 - Income Taxes - Reconciliation of Tax Rates (Details)
9 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Statutory tax rate 21.00% 21.00%  
Effect of state taxes (net of federal benefit) 1.00% 0.00%  
Rate differential on foreign earnings (4.00%) (25.00%)  
Valuation allowance (14.00%) (4.00%)  
Net operating loss (8.00%) (10.00%)  
Transaction costs (6.00%) 0.00%  
Disallowances for income tax purposes (2.00%) (21.00%)  
Tax relating to origination or reversal of temporary differences (2.00%) 0.00%  
Income exempt for tax purposes 0.00% 13.00%  
Global intangible low taxable income 0.00% (12.00%)  
Undistributed earnings 0.00% (8.00%)  
Foreign tax credit 0.00% (7.00%)  
Other, net (6.00%) (3.00%)  
Total (19.00%) (56.00%) 19.00%