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Note 10 - Income Taxes (Tables)
 12 Months Ended
Dec. 31, 2012
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
   
Year ended
December 31,
2012
   
Year ended
December 31,
2011
   
Year ended
December 31,
2010
 
Income for the year before provision for income taxes
 
$
6,428,298
   
$
3,450,610
   
$
2,327,793
 
Computed expected tax expense
 
$
2,185,621
   
$
1,173,207
   
$
791,450
 
Increase (reduction) in income tax expense resulting from:
                       
State income taxes
   
16,071
     
8,627
     
5,819
 
Permanent differences, including foreign exchange
   
21,728
     
13,700
     
(22,812
)
Investment tax credits recovered
   
(106,941
)
   
(41,833
)
   
(50,311
)
Other, including alternative minimum tax and adjustments to opening deferred tax assets
   
(112,323
)
   
(218,252
)
   
82,928
 
Change in beginning of the year balance of the valuation allowance allocated to income tax expense
   
—
     
(3,655,070
)
   
(596,229
)
Provision for (recovery of) income taxes
 
$
2,004,156
   
$
(2,719,621
)
 
$
210,845
 
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
   
December 31,
2012
   
December 31,
2011
 
Deferred tax assets:
           
Deferred revenue
 
$
5,429,220
   
$
5,648,563
 
Amortization
   
541,242
     
1,231,814
 
Total gross deferred tax assets
   
5,970,462
     
6,880,377
 
Less valuation allowance
   
—
     
—
 
Net deferred tax assets
 
$
5,970,462
   
$
6,880,377
 
Deferred income tax asset, current portion
   
—
     
—
 
Deferred income tax asset, long-term portion
   
5,970,462
     
6,880,377
 
   
$
5,970,462
   
$
6,880,377
 
Deferred tax liabilities:
               
Reserves and other
 
$
(914,429
)
 
$
(880,008
)
Limited life intangible assets
   
(394,100
)
   
(505,700
) 
Indefinite life intangible assets
   
(4,840,000
)
   
(4,840,000
)
Total deferred tax liabilities
   
(6,148,529
)
   
(6,225,708
)
Less deferred tax liability, current portion
   
(914,429
)
   
(880,008
)
Deferred tax liability, long-term portion
 
$
(5,234,100
)
 
$
(5,345,700
)
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
   
Total Gross
Unrecognized
Tax Benefits
 
Balance as at December 31, 2011
 
$
167,000
 
Increase in uncertain tax benefits for the current year
   
100,000
 
Increase in uncertain tax benefits for the prior year
   
165,000
 
Decrease in uncertain tax benefits of prior years
   
(50,000
)
Balance as at December 31, 2012
 
$
382,000