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Note 18 - Reportable Segments (Details) - Jun. 30, 2015 | Total | Total
--- | --- | ---
Sales Revenue, Segment [Member] | Customer Concentration Risk [Member] | Display Technologies [Member] |  |
Note 18 - Reportable Segments (Details) [Line Items] |  |
Number of Customers Individually Accounting for 10% or More of Each Segment's Sales | 3 | 3
Concentration Risk, Percentage | 61.00% | 61.00%
Sales Revenue, Segment [Member] | Customer Concentration Risk [Member] | Optical Communications [Member] |  |
Note 18 - Reportable Segments (Details) [Line Items] |  |
Number of Customers Individually Accounting for 10% or More of Each Segment's Sales | 2 | 1
Concentration Risk, Percentage | 22.00% | 11.00%
Sales Revenue, Segment [Member] | Customer Concentration Risk [Member] | Environmental Technologies [Member] |  |
Note 18 - Reportable Segments (Details) [Line Items] |  |
Number of Customers Individually Accounting for 10% or More of Each Segment's Sales | 3 | 3
Concentration Risk, Percentage | 87.00% | 86.00%
Sales Revenue, Segment [Member] | Customer Concentration Risk [Member] | Specialty Materials [Member] |  |
Note 18 - Reportable Segments (Details) [Line Items] |  |
Number of Customers Individually Accounting for 10% or More of Each Segment's Sales | 3 | 3
Concentration Risk, Percentage | 53.00% | 56.00%
Sales Revenue, Segment [Member] | Customer Concentration Risk [Member] | Life Sciences [Member] |  |
Note 18 - Reportable Segments (Details) [Line Items] |  |
Number of Customers Individually Accounting for 10% or More of Each Segment's Sales | 2 | 2
Concentration Risk, Percentage | 48.00% | 46.00%
Minimum [Member] |  |
Note 18 - Reportable Segments (Details) [Line Items] |  |
Number of Material Formulations |  | 150

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- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6404-108592 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13537-108611 + Details
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