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Consolidated Statements of Stockholders' Equity - USD ($)
Common Stock [Member]
Additional Paid-in Capital [Member]
Retained Earnings [Member]
AOCI Attributable to Parent [Member]
Total
Balances (in shares) 10,907,063        
Balances (in shares) at Dec. 31, 2013 10,907,063        
Balances at Dec. 31, 2013 $ 11,859,267 $ 28,632,311 $ (13,329,379) $ (244,981) $ 26,917,218
Exercise of stock options (in shares) 502,061       502,061
Exercise of stock options $ 2,365,825 (886,901)     $ 1,478,924
Repurchase and retirement of shares (note 10) (in shares) (79,392)       (79,392)
Repurchase and retirement of shares (note 10) $ (95,033) (1,086,824)     $ (1,181,857)
Income tax effect related to stock options exercised   1,888,734     1,888,734
Stock-based compensation (note 11)   542,738     542,738
Net income for the period     6,374,096   6,374,096
Other comprehensive income (loss)       (377,460) (377,460)
Balances (in shares) at Dec. 31, 2014 11,329,732        
Balances at Dec. 31, 2014 $ 14,130,059 29,090,058 (6,955,283) (622,441) $ 35,642,393
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration (in shares)        
Balances (in shares) 10,907,063        
Balances (in shares) 11,329,732        
Exercise of stock options (in shares) 517,998       517,998
Exercise of stock options $ 1,784,112 (980,976)     $ 803,136
Repurchase and retirement of shares (note 10) (in shares) (1,062,456)       (1,062,456)
Repurchase and retirement of shares (note 10) $ (1,383,538) (22,232,748)     $ (23,616,286)
Income tax effect related to stock options exercised   3,431,017     3,431,017
Stock-based compensation (note 11)   526,025     526,025
Net income for the period     11,373,730   11,373,730
Other comprehensive income (loss)       (487,011) (487,011)
Balances (in shares) at Dec. 31, 2015 10,685,599        
Balances at Dec. 31, 2015 $ 14,530,633 8,526,395 4,381,849 (1,109,452) $ 26,329,425
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration (in shares) (99,675)       (99,675)
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration   (1,306,981)     $ (1,306,981)
Accretion of redeemable non-controlling interest in Ting Virginia, LLC. (note 3)     (36,598)   $ (36,598)
Balances (in shares) 11,329,732        
Balances (in shares) 10,685,599        
Exercise of stock options (in shares) 109,963       109,963
Exercise of stock options $ 350,506 (204,116)     $ 146,390
Repurchase and retirement of shares (note 10) (in shares) (308,416)       (308,416)
Repurchase and retirement of shares (note 10) $ (420,639) (6,759,618)     $ (7,180,257)
Income tax effect related to stock options exercised   859,111     859,111
Stock-based compensation (note 11)   799,434     799,434
Net income for the period     16,067,154   16,067,154
Other comprehensive income (loss)       1,208,606 1,208,606
Balances (in shares) at Dec. 31, 2016 10,461,574        
Balances at Dec. 31, 2016 $ 14,460,500 2,857,921 20,399,511 $ 99,154 $ 37,817,086
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration (in shares) (25,572)       (25,572)
Shares deducted from exercise of stock options for payment of witholding taxes and exercise consideration   $ (363,285)     $ (363,285)
Accretion of redeemable non-controlling interest in Ting Virginia, LLC. (note 3)     $ (49,492)   $ (49,492)
Balances (in shares) 10,685,599        
Balances (in shares) 10,461,574