Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Disaggregation of Revenue [Line Items]
Net Revenue	$ 15,559,439	$ 14,948,579
Concentrate Products [Member]
Disaggregation of Revenue [Line Items]
Net Revenue	15,491,000	14,880,000
Product License Agreements | Drug Revenue [Member]
Disaggregation of Revenue [Line Items]
Net Revenue	68,000	68,000
Product License Agreements | Concentrate Products [Member]
Disaggregation of Revenue [Line Items]
Net Revenue	495,000	504,000
Product Sales [Member] | Concentrate Products [Member]
Disaggregation of Revenue [Line Items]
Net Revenue	14,996,000	14,376,000
Rest Of World [Member]
Disaggregation of Revenue [Line Items]
Net Revenue	2,141,000	1,972,000
Rest Of World [Member] | Concentrate Products [Member]
Disaggregation of Revenue [Line Items]
Net Revenue	2,073,000	1,904,000
Rest Of World [Member] | Product License Agreements | Drug Revenue [Member]
Disaggregation of Revenue [Line Items]
Net Revenue	68,000	68,000
Rest Of World [Member] | Product Sales [Member] | Concentrate Products [Member]
Disaggregation of Revenue [Line Items]
Net Revenue	2,073,000	1,904,000
United States
Disaggregation of Revenue [Line Items]
Net Revenue	13,418,000	12,976,000
United States | Concentrate Products [Member]
Disaggregation of Revenue [Line Items]
Net Revenue	13,418,000	12,976,000
United States | Product License Agreements | Concentrate Products [Member]
Disaggregation of Revenue [Line Items]
Net Revenue	495,000	504,000
United States | Product Sales [Member] | Concentrate Products [Member]
Disaggregation of Revenue [Line Items]
Net Revenue	$ 12,923,000	$ 12,472,000