XML 57 R47.htm IDEA: XBRL DOCUMENT v3.10.0.1
Note 11 - Financing Arrangements (Details Textual) - USD ($)
May 25, 2018
Jun. 30, 2018
Mar. 31, 2018
Long-term Debt, Total   $ 40,866,830 $ 48,084,950
Loans [Member] | MBT [Member]      
Debt Instrument, Amount Guaranteed by Company for Wholly-owned Subsidiaries, After Certain Conditions Met $ 3,000,000    
Loans [Member] | MBT [Member] | Revolving Loan [Member]      
Line of Credit Facility, Maximum Borrowing Capacity $ 1,500,000    
Long-term Line of Credit, Total   0  
Loans [Member] | MBT [Member] | Revolving Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument, Basis Spread on Variable Rate 2.00%    
Loans [Member] | MBT [Member] | Term Loan [Member]      
Debt Instrument, Face Amount $ 3,400,000    
Long-term Debt, Total   $ 3,400,000  
Loans [Member] | MBT [Member] | Term Loan [Member] | London Interbank Offered Rate (LIBOR) [Member]      
Debt Instrument, Basis Spread on Variable Rate 2.50%