Note H - Segment Information (Details Textual) - USD ($)	3 Months Ended	9 Months Ended
Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Products Manufactured by NAIE [Member] \| UNITED STATES
Revenue, Net			$ 0	$ 0
Products Manufactured by NAIE [Member] \| Non-US [Member] \| Sales Revenue, Net [Member] \| Product Concentration Risk [Member]
Concentration Risk, Percentage	57.00%	74.00%	67.00%	72.00%
UNITED STATES
Revenue, Net	$ 13,374,000	$ 11,857,000	$ 38,665,000	$ 30,941,000
Non-US [Member]
Revenue, Net	16,632,000	7,756,000	39,837,000	25,985,000
Revenue, Net	$ 30,006,000	$ 19,613,000	$ 78,502,000	$ 56,926,000
Number of Reportable Segments			3

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.

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=64851502&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=73719730&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=64851502&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=73719730&loc=d3e13537-108611

Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration