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Consolidated Condensed Statement of Changes in Stockholders' Equity - 9 months ended Mar. 31, 2018 - USD ($)
Total
Common Stock
Additional Paid-in Capital
Retained Earnings
Treasury Stock
Beginning Balance at Jun. 30, 2017 $ 68,469,855 $ 33,087 $ 40,961,957 $ 27,474,811 $ 0
Beginning Balance (shares) at Jun. 30, 2017 33,087,308 33,087,308      
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Issuance of restricted common stock (shares)   158,785      
Issuance of restricted common stock $ 0 $ 158 (158)    
Forfeitures of restricted stock (shares)   (19,561)      
Forfeitures of restricted stock   $ (20) 20    
Common share repurchases, including shares surrendered for tax withholding (shares)   (55,018)      
Common share repurchases, including shares surrendered for tax withholding (395,550)       (395,550)
Retirements of treasury stock   $ (54) (395,496)   395,550
Stock-based compensation 1,324,230   1,324,230    
Net income attributable to the Company 15,085,734     15,085,734  
Common stock cash dividends (8,286,486)     (8,286,486)  
Ending Balance at Mar. 31, 2018 $ 76,197,783 $ 33,171 $ 41,890,553 $ 34,274,059 $ 0
Ending Balance (shares) at Mar. 31, 2018 33,171,514 33,171,514