Note 2 - Recent Accounting Pronouncements (Details Textual) $ in Thousands	6 Months Ended
	Dec. 31, 2018 USD ($)
Reclassification of Unrealized Gain (Loss) from AOCI to Retained Earnings
Retained Earnings [Member]
Reclassification of Unrealized Gain (Loss) from AOCI to Retained Earnings	(180)
Retained Earnings [Member] | Accounting Standards Update 2016-01 [Member]
Reclassification of Unrealized Gain (Loss) from AOCI to Retained Earnings	(180)
AOCI Attributable to Parent [Member]
Reclassification of Unrealized Gain (Loss) from AOCI to Retained Earnings	180
AOCI Attributable to Parent [Member] | Accounting Standards Update 2016-01 [Member]
Reclassification of Unrealized Gain (Loss) from AOCI to Retained Earnings	$ 180