Note 15 - Concentration of Risk

12 Months Ended

Dec. 31, 2014

Risks and Uncertainties [Abstract]

Concentration Risk Disclosure [Text Block]

15.    Concentration of Risk

          The Company maintains its cash 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 and common stock warrants are in one publicly traded entity. The Company has recognized gain on investment in common stock warrants and unrealized gain in comprehensive income. The Company is exposed to the fluctuation in the stock price of this investment.

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 subcontractors located in Asia and, to a much lesser extent, a subcontractor 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 US. Customers accounting for 10% or more of accounts receivable as of December 31, 2014 and 2013, and 10% or more of net sales for the years ended December 31, 2014 and 2013, were as follows:

Accounts receivable:	2014		2013
Customer A		*		11%
Customer B		17%		21%
Customer C		17%		*
Net Sales:
Customer A		*		14%
Customer B		15%		18%
Customer C		*		*

* Customer’s balances were below the 10% threshold for accounts receivable or net sales for 2014 or 2013, as applicable.