XML 59 R48.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 11 - Income Taxes (Details Textual)
3 Months Ended 6 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Mar. 31, 2018
Effective Income Tax Rate Reconciliation, Percent 24.20% 26.60% 12.20% 20.30%  
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent 34.00%   34.00%    
Scenario, Forecast [Member] | Minimum [Member]          
Effective Income Tax Rate Reconciliation, Percent         36.00%
Scenario, Forecast [Member] | Maximum [Member]          
Effective Income Tax Rate Reconciliation, Percent         39.00%