Quarterly report pursuant to Section 13 or 15(d)

CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED)

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CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($)
Total
Common stock
Additional paid-in capital
Accumulated deficit
Notes receivable from stockholders
Accumulated other comprehensive income
Beginning balance at Dec. 31, 2017 $ 74,293,963 $ 263,951 $ 250,826,873 $ (178,368,012) $ (908,054) $ 2,479,205
Beginning balance (in shares) at Dec. 31, 2017   26,395,048        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock based compensation 491,654   491,654      
Restricted stock issued 0 $ 869 (869)      
Restricted stock issued (in shares)   86,900        
Restricted stock units vested, net of taxes (54,155) $ 502 (54,657)      
Restricted stock units vested, net of taxes (in shares)   50,247        
Restricted stock forfeitures 0 $ (460) 460      
Restricted stock forfeitures (in shares)   (46,043)        
Foreign currency translation adjustment (66,162)         (66,162)
Net income (loss) 1,419,627     1,419,627    
Ending balance at Sep. 30, 2018 76,084,927 $ 264,862 251,263,461 (176,948,385) (908,054) 2,413,043
Ending balance (in shares) at Sep. 30, 2018   26,486,152        
Beginning balance at Jun. 30, 2018 75,029,886 $ 264,862 250,962,076 (177,688,941) (908,054) 2,399,943
Beginning balance (in shares) at Jun. 30, 2018   26,486,152        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock based compensation 301,385   301,385      
Foreign currency translation adjustment 13,100         13,100
Net income (loss) 740,556     740,556    
Ending balance at Sep. 30, 2018 76,084,927 $ 264,862 251,263,461 (176,948,385) (908,054) 2,413,043
Ending balance (in shares) at Sep. 30, 2018   26,486,152        
Beginning balance at Dec. 31, 2018 $ 76,775,717 $ 264,862 251,551,001 (176,498,057) (908,054) 2,365,965
Beginning balance (in shares) at Dec. 31, 2018 26,486,152 26,486,152        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock based compensation $ 291,023   291,023      
Restricted stock issued 0 $ 718 (718)      
Restricted stock issued (in shares)   71,780        
Restricted stock units vested, net of taxes (112,921) $ 1,128 (114,049)      
Restricted stock units vested, net of taxes (in shares)   112,775        
Restricted stock forfeitures 0 $ (55) 55      
Restricted stock forfeitures (in shares)   (5,467)        
Foreign currency translation adjustment 67,270         67,270
Net income (loss) (1,078,060)     (1,078,060)    
Ending balance at Sep. 30, 2019 $ 75,943,029 $ 266,653 251,727,312 (177,576,117) (908,054) 2,433,235
Ending balance (in shares) at Sep. 30, 2019 26,665,240 26,665,240        
Beginning balance at Jun. 30, 2019 $ 75,917,458 $ 266,653 251,638,418 (177,512,794) (908,054) 2,433,235
Beginning balance (in shares) at Jun. 30, 2019   26,665,240        
Increase (Decrease) in Stockholders' Equity [Roll Forward]            
Stock based compensation 88,894   88,894      
Foreign currency translation adjustment 0          
Net income (loss) (63,323)     (63,323)    
Ending balance at Sep. 30, 2019 $ 75,943,029 $ 266,653 $ 251,727,312 $ (177,576,117) $ (908,054) $ 2,433,235
Ending balance (in shares) at Sep. 30, 2019 26,665,240 26,665,240