Note 5 - Significant Risks and Uncertainties (Details Textual)	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Jun. 30, 2018
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]
Number of Major Customers	2	2
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Contract Manufacturing [Member]
Number of Major Customers	2	2		2
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage	93.00%	91.00%	91.00%	91.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Major Customer 1 [Member] | Contract Manufacturing [Member]
Concentration Risk, Percentage	75.00%	79.00%	70.00%	71.00%
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Major Customer 2 [Member] | Contract Manufacturing [Member]
Concentration Risk, Percentage	20.00%	16.00%	24.00%	23.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member]
Number of Major Customers			2	2	2
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Two Customers [Member]
Concentration Risk, Percentage			90.00%		87.00%
Number of Employees, Geographic Area [Member] | Unionized Employees Concentration Risk [Member]
Concentration Risk, Percentage			69.00%