Note 16 - Concentrations (Details Textual)	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Revenue Benchmark [Member] | Customer Concentration Risk [Member]
Number of Major Customers		5
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Largest Single Customer [Member]
Concentration Risk, Percentage	18.00%	18.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Second Largest Single Customer [Member]
Concentration Risk, Percentage	11.00%	7.00%
Revenue Benchmark [Member] | Customer Concentration Risk [Member] | Five Largest Customers [Member]
Concentration Risk, Percentage	48.00%	47.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Largest Single Customer [Member]
Concentration Risk, Percentage	17.00%	17.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Five Largest Customers [Member]
Concentration Risk, Percentage	8.00%	33.00%
Accounts Receivable [Member] | Geographic Concentration Risk [Member] | Non-US [Member]
Concentration Risk, Percentage	11.00%	10.00%
Manufacturing Costs Benchmark [Member] | Supplier Concentration Risk [Member]
Concentration Risk, Percentage	70.00%
Number of Major Vendors	1