Note 16 - Concentration of Risk

12 Months Ended

Dec. 31, 2020

Notes to Financial Statements

Concentration Risk Disclosure [Text Block]

16. Concentration of Risk

The Company maintains its cash and cash equivalents in various bank accounts, the balances of which at times

may

exceed federally insured limits. The Company has

not

experienced any losses related to these accounts, and management does

not

believe that the Company is exposed to significant credit risk.

The Company's investments in marketable securities were held in

one

publicly traded entity. The Company recognized a gain on investment in common stock warrants in a prior period and during

2020

recognized a realized loss of

$160,000

and an unrealized gain of

$98,000

in the consolidated statement of comprehensive income. During

2019,

the Company recognized realized gain of

$61,000

and an unrealized loss of

$170,000

in the consolidated statement of comprehensive income. The Company was exposed to the fluctuation in the stock price of this investment when it held these securities. As of

December 31, 2020

the Company

no

longer holds any investments in marketable securities.

Management believes that adequate provision has been made for risk of loss on all credit transactions.

The Company buys a significant amount of its disposable protective apparel products from a limited number of contract manufacturers located in Asia and, to a much lesser extent, a contract manufacturer in Mexico. Management believes that other suppliers could provide similar products at comparable terms. A change in suppliers, however, could cause a delay in shipment and a possible loss of sales, which would affect operating results adversely.

The Building Supply segment buys semi-finished housewrap and synthetic roof underlayment from its joint venture, Harmony, located in India. Although there are a limited number of manufacturers of the particular product, management believes that other suppliers could provide similar products at comparable terms. A change in suppliers, however, could cause a delay in shipment and a possible loss of sales, which would affect operating results adversely.

The Company provides products to customers located primarily in the United States. Customers accounting for

10%

or more of accounts receivable as of

December 31, 2020

and

2019,

and

10%

or more of net sales for the years ended

December 31, 2020

and

2019,

were as follows:

	December 31,
	2020			2019
Accounts Receivable:
Customer A		11	%		18	%
Customer B		*			*
Customer C		*			10	%
Customer D		18	%		*
Net sales:
Customer A		20	%		20	%
Customer B		12	%		12	%
Customer D		10	%		*

*

Customer's balance was below the

10%

threshold for accounts receivable and/or net sales as of and for the year ended

December 31, 2020

and

December 31, 2019.