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CONDENSED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
Total
Balance, beginning at Dec. 31, 2014 $ 8,501 $ 51,440,770 $ 13,373,601 $ (9,716) $ 64,813,156
Balance, beginning (in shares) at Dec. 31, 2014 8,500,555        
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss)     4,364,313   4,364,313
Change in unrealized loss from interest rate swap       3,906 3,906
Common stock issued upon exercise of options $ 26 79,974     80,000
Common stock issued upon exercise of options (in shares) 25,352        
Tax benefit of stock option exercise   33,000     33,000
Stock-based compensation expense $ 37 491,464     491,501
Stock-based compensation expense (in shares) 38,510        
Balance, ending at Sep. 30, 2015 $ 8,564 52,045,208 17,737,914 (5,810) 69,785,876
Balance, ending (in shares) at Sep. 30, 2015 8,564,417        
Balance, beginning at Dec. 31, 2015 $ 8,584 52,137,384 18,389,594 (3,453) $ 70,532,109
Balance, beginning (in shares) at Dec. 31, 2015 8,583,511       8,583,511
Increase (Decrease) in Stockholders' Equity [Roll Forward]          
Net income (loss)     (5,743,579)   $ (5,743,579)
Loss on settlement and reclassification into earnings       3,453 3,453
Change in unrealized loss from interest rate swap       (48,000) (48,000)
Stock-based compensation expense $ 138 564,455     564,593
Stock-based compensation expense (in shares) 139,058        
Balance, ending at Sep. 30, 2016 $ 8,722 $ 52,701,839 $ 12,646,015 $ (48,000) $ 65,308,576
Balance, ending (in shares) at Sep. 30, 2016 8,722,569       8,722,569