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CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
Total
Balance, beginning at Dec. 31, 2016 $ 8,738 $ 52,824,950 $ 14,781,018 $ (9,000) $ 67,605,706
Balance, beginning (in shares) at Dec. 31, 2016 8,739,836        
Net income     5,767,634   5,767,634
Change in unrealized loss from interest rate swap       (5,800) (5,800)
Common stock issued upon exercise of options $ 3 (3)      
Common stock issued upon exercise of options (in shares) 3,334        
Common stock issued as employee compensation $ 6 50,776     50,782
Common stock issued as employee compensation (in shares) 5,550        
Stock based compensation expense $ 116 894,895     895,011
Stock based compensation expense (in shares) 115,599        
Balance, ending at Dec. 31, 2017 $ 8,863 53,770,618 20,548,652 (14,800) $ 74,313,333
Balance, ending (in shares) at Dec. 31, 2017 8,864,319       8,864,319
Net income     2,211,563   $ 2,211,563
Change in unrealized loss from interest rate swap       $ 14,800 14,800
Common stock issued in share offering, net of expenses $ 2,760 16,163,357     16,166,117
Common stock issued in share offering, net of expenses (in shares) 2,760,000        
Common stock issued as employee compensation $ 5 45,908     45,913
Common stock issued as employee compensation (in shares) 5,130        
Stock based compensation expense $ 87 671,533     671,620
Stock based compensation expense (in shares) 88,797        
Balance, ending at Dec. 31, 2018 $ 11,715 $ 70,651,416 $ 22,760,215   $ 93,423,346
Balance, ending (in shares) at Dec. 31, 2018 11,718,246       11,718,246