Note H - Segment Information (Details Textual) - USD ($)	3 Months Ended	6 Months Ended
Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
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	71.00%	75.00%	74.00%	71.00%
UNITED STATES
Revenue, Net	$ 12,498,000	$ 9,373,000	$ 25,291,000	$ 19,084,000
Non-US [Member]
Revenue, Net	14,413,000	9,245,000	23,205,000	18,229,000
Revenue, Net	$ 26,911,000	$ 18,618,000	$ 48,496,000	$ 37,313,000
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=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

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