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Consolidated Condensed Statement of Changes in Stockholders' Equity - 3 months ended Sep. 30, 2017 - 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)   14,254      
Issuance of restricted common stock $ 0 $ 14 (14)    
Forfeitures of restricted stock (shares)   (19,561)      
Forfeitures of restricted stock   $ (20) 20    
Common share repurchases, including shares surrendered for tax withholding (shares)   (15,284)      
Common share repurchases, including shares surrendered for tax withholding (110,753)       (110,753)
Retirements of treasury stock   $ (15) (110,738)   110,753
Stock-based compensation 487,484   487,484    
Net income attributable to the Company 2,140,532     2,140,532  
Common stock cash dividends (2,481,471)     (2,481,471)  
Ending Balance at Sep. 30, 2017 $ 68,505,647 $ 33,066 $ 41,338,709 $ 27,133,872 $ 0
Ending Balance (shares) at Sep. 30, 2017 33,066,717 33,066,717