Equipment (Details) - USD ($)	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 1,134,855	$ 1,264,025
Less accumulated depreciation	(1,107,108)	(1,245,437)
Equipment, net	27,747	18,588
Computer equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	448,198	554,880
Lab equipment
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	186,456	208,943
Furniture
Property, Plant and Equipment [Line Items]
Property, plant, and equipment	$ 500,201	$ 500,202