Annual report pursuant to Section 13 and 15(d)

Income (loss) per common share - Schedule of Loss Per Common Share, Basic and Diluted (Details)

v3.19.1
Income (loss) per common share - Schedule of Loss Per Common Share, Basic and Diluted (Details) - USD ($)
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Net income (loss) attributable to stockholders $ (5,708,532) $ 47,436
Weighted average shares outstanding - basic (shares) 24,815,926 23,171,033
Basic income (loss) per share (in USD per share) $ (0.23) $ 0.00
Weighted average shares outstanding - diluted (shares) 24,815,926 23,342,627
Diluted income (loss) per share (in USD per share) $ (0.23) $ 0.00
Stock Options    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Anti-dilutive shares 144,077 441,356