XML 75 R61.htm IDEA: XBRL DOCUMENT v3.10.0.1
Note 7 - Revolving Line of Credit and Long-term Debt (Details Textual) - USD ($)
1 Months Ended
Feb. 28, 2017
Jun. 30, 2018
Feb. 21, 2017
Line of Credit Facility, Maximum Borrowing Capacity     $ 100,000,000
Long-term Line of Credit, Total   $ 45,400,000  
Line of Credit Facility, Remaining Borrowing Capacity   $ 54,600,000  
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member]      
Debt Instrument, Basis Spread on Variable Rate 1.25%    
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member]      
Debt Instrument, Basis Spread on Variable Rate 2.50%    
UNITED STATES      
Line of Credit Facility, Maximum Borrowing Capacity $ 100,000,000    
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage 0.15%