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Consolidated Statement of Changes in Stockholders' Equity (Unaudited) - USD ($)
Public Stock Offering [Member]
Common Stock [Member]
Public Stock Offering [Member]
Additional Paid-in Capital [Member]
Public Stock Offering [Member]
Treasury Stock [Member]
Public Stock Offering [Member]
Deferred Compensation, Share-based Payments [Member]
Public Stock Offering [Member]
Retained Earnings [Member]
Public Stock Offering [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Treasury Stock [Member]
Deferred Compensation, Share-based Payments [Member]
Retained Earnings [Member]
Total
Balance (in shares) at Dec. 31, 2019             18,224,577          
Balance at Dec. 31, 2019             $ 186,656 $ 77,055,273 $ (1,885,452) $ (5,636,154) $ (62,151,988) $ 7,568,335
Issuance of common stock under equity incentive plan (in shares) 51,000                      
Issuance of common stock under equity incentive plan $ 51 $ 59,440 $ 59,491            
Warrant compensation costs             8,985 8,985
Deferred compensation amortization             228,219 228,219
Purchase of treasury stock costs             (26,629) (26,629)
Net (loss) for the period             (835,009) (835,009)
Balance (in shares) at Mar. 31, 2020             18,275,577          
Balance at Mar. 31, 2020             $ 186,707 77,123,698 (1,912,081) (5,407,935) (62,986,997) 7,003,392
Balance (in shares) at Dec. 31, 2020             26,260,776          
Balance at Dec. 31, 2020             $ 194,692 89,659,433 (2,165,721) (5,926,872) (65,058,171) 16,703,361
Issuance of common stock under equity incentive plan (in shares)             51,000          
Issuance of common stock under equity incentive plan             $ 51 120,484 120,535
Warrant compensation costs             8,985 8,985
Cashless warrant exercise (in shares)             19,795          
Cashless warrant exercise             $ 19 (19)
Reversal of deferred compensation amortization that did not vest (in shares)             (17,111)          
Reversal of deferred compensation amortization that did not vest             $ (17) (48,599) 5,994 (42,622)
Deferred compensation amortization             249,801 249,801
Purchase of treasury stock costs             (49,454) (49,454)
Net (loss) for the period             (720,252) (720,252)
Balance (in shares) at Mar. 31, 2021             26,314,460          
Balance at Mar. 31, 2021             $ 194,745 $ 89,740,284 $ (2,215,175) $ (5,671,077) $ (65,778,423) $ 16,270,354