Annual report pursuant to Section 13 and 15(d)

CONCENTRATIONS OF REVENUES AND CREDIT RISK

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CONCENTRATIONS OF REVENUES AND CREDIT RISK
12 Months Ended
Dec. 31, 2017
CONCENTRATIONS OF REVENUES AND CREDIT RISK [Abstract]  
CONCENTRATIONS OF REVENUES AND CREDIT RISK
NOTE 4 - CONCENTRATIONS OF REVENUES AND CREDIT RISK

We sell our products and services to companies in the chemical, plastics, and petroleum industries.  We perform periodic credit evaluations of our customers and generally do not require collateral from our customers.  For the year ended December 31, 2017, one customer accounted for 19.6% of petrochemical product revenue.  For the year ended December 31, 2016, one customer accounted for 20.1% of petrochemical product revenue.  For the year ended December 31, 2015, one customer accounted for 20.1% of petrochemical product revenue.  The associated accounts receivable balances for those customers were approximately $5.8 million at December 31, 2017, and $5.1 million at December 31, 2016.  The carrying amount of accounts receivable approximates fair value at December 31, 2017, and 2016.

Accounts receivable serves as collateral for our amended and restated loan agreement (see Note 13).

We market our products in many foreign jurisdictions.  For the years ended December 31, 2017, 2016 and 2015, petrochemical product sales revenue in foreign jurisdictions accounted for approximately 20.8%, 23.5%, and 26.0% of total product sales revenue, respectively.

SHR utilizes one major supplier for its feedstock supply. The feedstock is a commodity product commonly available from other suppliers if needed.  The percentage of feedstock purchased from the supplier during 2017, 2016, and 2015 was 100% 99.4% and 100%, respectively.  At December 31, 2017, and 2016, we owed the supplier approximately $8.5 million and $3.7 million, respectively for feedstock purchases.

We hold our cash with various financial institutions that are insured by the Federal Deposit Insurance Corporation up to $250,000.  At times during the year, cash balances may exceed this limit.  We have not experienced any losses in such accounts and do not believe we are exposed to any significant risk of loss related to cash.