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Note 13 - Significant Risks and Uncertainties | 12 Months Ended
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Dec. 31, 2017
Notes to Financial Statements |
Concentration Risk Disclosure [Text Block] | Note 1 3 – Significant Risks and U ncertainties Cash and Cash Equivalents The Company places most of its temporary cash investments with financial institutions, which from time to time may exceed the Federal Deposit Insurance Corporation limit. The amount at risk at December 31, 20 17 and at December 31, 2016 was $12,198,000 and $20,157,000 respectively. Sales Concentration s Revenue to a single customer in any one year can exceed 10.0% of our total sales. One customer represented 66.1% and 45.3% respectively, of our annual revenues in fiscal years 2017 and 2016. Previously, we have not been generally dependent on any single customer, and the loss of any customer would be replaced by others, however, the dynamic has changed and although, we believe that our relationship with our current largest customer will provide us with ongoing continuous sustainability for years to come, the loss of our largest customer would have to be replaced by others, and our inability to do so may have a material adverse effect on our business and financial condition. Export sales to unaffiliated customers represented approximately 9.6% and 11.9% of sales for the years ended December 31, 2017 and 2016, respectively. Export sales in both 2017 and 2016 were primarily to customers in Europe and Asia. All contracts except those entered into by CVD Tantaline ApS are denominated in U.S. dollars. The Company does not enter into any foreign exchange contracts.

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- Definition The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -URI http://asc.fasb.org/topic&trid=2134479 + Details
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