Note 2 - Significant Accounting Policies - Earnings Per Share, Basic and Diluted (Details) - shares	3 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Common stock, issued (in shares)	23,761,168		23,573,057	22,089,650
Shares held by subsidiaries (Note 7) (in shares)	(704,309)	(704,309)
Common stock, outstanding (in shares)	23,056,859		22,868,748	21,385,341
Weighted average shares for fully vested stock bonuses (in shares)	600,000	600,000
Weighted average shares issued during the period (in shares)	75,374	303,736
Basic weighted average shares – end of period (in shares)	23,544,122	22,289,077