Note 3 - Major Customers and Suppliers

12 Months Ended

Dec. 31, 2019

Notes to Financial Statements

Major Customers and Suppliers Disclosure [Text Block]

(

3

) MAJOR CUSTOMERS AND SUPPLIERS:

Our revenues are derived primarily from chemical supply and pharmaceutical companies located primarily in the United States. In

2019,

four

major customers accounted for

70%

of total revenues. Accounts receivable balances for these major customers represent

95%

of total accounts receivable at

December 31, 2019.

In

2018,

four

major customers accounted for

57%

of total revenues. Accounts receivable balances for these major customers represent

31%

of total accounts receivable at

December 31, 2018.

Substantially all inventory purchases were from

three

vendors in

2019

and

2018.

These vendors are located primarily outside the United States.

We have

three

sources for our Aquaplex® products. There are multiple sources for our Trappsol

®

products.

For the year ended

December 31, 2019,

the product mix of our revenues consisted of

10%

biopharmaceuticals,

75%

basic natural and chemically modified cyclodextrins, and

15%

cyclodextrin complexes. For the year ended

December 

31,

2018,

the product mix of our revenues consisted of

17%

biopharmaceuticals,

71%

basic natural and chemically modified cyclodextrins, and

12%

cyclodextrin complexes.