Note 11 - Concentrations - Summary of Net Equipment by Geographic Area (Details) - USD ($)	Dec. 31, 2017	Jun. 30, 2017	Jun. 30, 2016
Property, Plant, and Equipment Concentration	$ 2,996,000	$ 2,330,000	$ 2,962,000
Geographic Concentration Risk [Member] | UNITED STATES
Property, Plant, and Equipment Concentration	2,265,000	1,559,000	2,030,000
Geographic Concentration Risk [Member] | COSTA RICA
Property, Plant, and Equipment Concentration	276,000	322,000	367,000
Geographic Concentration Risk [Member] | INDIA
Property, Plant, and Equipment Concentration	288,000	261,000	279,000
Geographic Concentration Risk [Member] | All Other Countries [Member]
Property, Plant, and Equipment Concentration	$ 167,000	$ 188,000	$ 286,000