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Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($)
Preferred Stock [Member]
Series A-1 Convertible Preferred Stock [Member]
Preferred Stock [Member]
Series B-1 Convertible Preferred Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
Series A-1 Convertible Preferred Stock [Member]
Series B-1 Convertible Preferred Stock [Member]
Total
Balance (in shares) at Dec. 31, 2017 62,596 105,000 7,691,324     62,596 105,000  
Balance at Dec. 31, 2017 $ 6 $ 11 $ 769 $ 80,829,001 $ (67,076,492)     $ 13,753,295
Issuance of common stock for directors’ fees (in shares) 8,421          
Issuance of common stock for directors’ fees $ 1 16,512     16,513
Share-based compensation 533,421     533,421
Net loss (2,191,992)     (2,191,992)
Adoption of ASC 606 240,017     240,017
Dividends declared on preferred stock (156,162)     (156,162)
Conversion of B-1 preferred stock to common stock (in shares) (60,420) 1,678,334          
Conversion of B-1 preferred stock to common stock $ (6) $ 168 (162)    
Conversion of dividends payable on B-1 preferred stock (in shares) 115,857          
Conversion of dividends payable on B-1 preferred stock $ 11 417,072     417,083
Balance (in shares) at Mar. 31, 2018 62,596 44,580 9,493,936          
Balance at Mar. 31, 2018 $ 6 $ 5 $ 949 81,639,682 (69,028,467)     12,612,175
Balance (in shares) at Dec. 31, 2017 62,596 105,000 7,691,324     62,596 105,000  
Balance at Dec. 31, 2017 $ 6 $ 11 $ 769 80,829,001 (67,076,492)     13,753,295
Net loss               (3,847,456)
Balance (in shares) at Jun. 30, 2018 12,587,997          
Balance at Jun. 30, 2018 $ 1,259 82,143,199 (70,683,931)     11,460,527
Balance (in shares) at Mar. 31, 2018 62,596 44,580 9,493,936          
Balance at Mar. 31, 2018 $ 6 $ 5 $ 949 81,639,682 (69,028,467)     12,612,175
Issuance of common stock for directors’ fees (in shares) 2,683          
Issuance of common stock for directors’ fees $ 1 6,508     6,509
Share-based compensation 143,034     143,034
Net loss (1,655,465)     (1,655,465)
Dividends declared on preferred stock (41,871)     (41,871)
Conversion of B-1 preferred stock to common stock (in shares) (44,580) 1,238,334          
Conversion of B-1 preferred stock to common stock $ (5) $ 123 (118)    
Conversion of dividends payable on B-1 preferred stock (in shares) 15,373          
Conversion of dividends payable on B-1 preferred stock $ 2 55,339     55,341
Conversion of A-1 preferred stock to common stock (in shares) (62,596) 1,738,778          
Conversion of A-1 preferred stock to common stock $ (6) $ 174 (168)    
Conversion of dividends payable on A-1 preferred stock (in shares) 98,893          
Conversion of dividends payable on A-1 preferred stock $ 10 356,005     356,015
Legal fees (15,212)     (15,212)
Rounding 1     1
Balance (in shares) at Jun. 30, 2018 12,587,997          
Balance at Jun. 30, 2018 $ 1,259 82,143,199 (70,683,931)     11,460,527
Balance (in shares) at Dec. 31, 2018 13,977,868      
Balance at Dec. 31, 2018 $ 1,398 85,599,140 (75,134,316)     10,466,222
Issuance of common stock for directors’ fees (in shares) 13,820          
Issuance of common stock for directors’ fees $ 1 16,505     16,506
Share-based compensation 509,528     509,528
Net loss (1,803,508)     (1,803,508)
Balance (in shares) at Mar. 31, 2019 13,991,688          
Balance at Mar. 31, 2019 $ 1,399 86,125,173 (76,937,824)     9,188,748
Balance (in shares) at Dec. 31, 2018 13,977,868      
Balance at Dec. 31, 2018 $ 1,398 85,599,140 (75,134,316)     10,466,222
Net loss               (3,229,251)
Balance (in shares) at Jun. 30, 2019 14,295,923          
Balance at Jun. 30, 2019 $ 1,429 86,436,197 (78,363,567)     8,074,059
Balance (in shares) at Mar. 31, 2019 13,991,688          
Balance at Mar. 31, 2019 $ 1,399 86,125,173 (76,937,824)     9,188,748
Issuance of common stock for directors’ fees (in shares) 4,235          
Issuance of common stock for directors’ fees 5,505     5,505
Share-based compensation 125,549     125,549
Net loss (1,425,743)     $ (1,425,743)
Issuance of common stock for commitment fees (in shares) 300,000         300,000
Issuance of common stock for commitment fees $ 30 449,970     $ 450,000
Commitment fee adjustment (270,000)     (270,000)
Balance (in shares) at Jun. 30, 2019 14,295,923          
Balance at Jun. 30, 2019 $ 1,429 $ 86,436,197 $ (78,363,567)     $ 8,074,059