Consolidated Balance Sheets (Parenthetical) - USD ($)	Mar. 31, 2018	Dec. 31, 2017
Consolidated Balance Sheets
Patent costs, accumulated amortization	$ 958,543	$ 953,491
Trademark costs, accumulated amortization	86,505	85,381
Deferred financing costs	$ 0	$ 45,079
Common stock, par value per share	$ 0.01	$ 0.01
Common stock, shares authorized	175,000,000	175,000,000
Common stock, shares issued	54,126,648	54,108,510
Common stock, shares outstanding	54,126,648	54,108,510