XML 39 R31.htm IDEA: XBRL DOCUMENT v3.10.0.1
Note 9 - Stock Repurchase Program (Details Textual) - Repurchase Program 2009 [Member] - USD ($)
3 Months Ended
Sep. 30, 2018
Aug. 27, 2015
Jan. 21, 2009
Stock Repurchase Program, Authorized Amount     $ 2,500,000
Stock Repurchase Program Authorized Additional Amount   $ 5,000,000  
Stock Repurchased and Retired During Period, Value $ 0    
Stock Repurchase Program, Remaining Authorized Repurchase Amount $ 4,540,806