Annual report pursuant to Section 13 and 15(d)

Income Taxes - Temporary Differences (Details)

v3.8.0.1
Income Taxes - Temporary Differences (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Deferred tax assets:        
Net operating loss carryforwards   $ 27,578,200 $ 38,299,400 $ 33,424,100
Charitable contributions   300 500 500
Inventory Reserves   205,800 361,300 267,700
Amortization   22,800 89,500 51,400
Allowance for doubtful accounts   116,900 102,300 72,300
Stock-based compensation   519,900 341,400 260,600
Total deferred tax assets   28,443,900 39,194,400 34,076,600
Deferred tax liabilities:        
Depreciation   (80,500) (83,300) (62,400)
Deferred revenue   (6,400)    
Net deferred tax assets   28,357,000 39,111,100 34,014,200
Valuation allowance   $ (28,357,000) $ (39,111,100) $ (34,014,200)
Corporate income tax rate   35.00%    
Forecast        
Deferred tax liabilities:        
Corporate income tax rate 21.00%