Note 3 - Investment Securities - Securities in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Dec. 31, 2018	Jun. 30, 2018
Equity investments measured at net asset value, fair value, less than 12 months
Equity investments measured at net asset value, unrealized losses, less than 12 months
Equity investments measured at net asset value, fair value, more than 12 months	5,147	5,076
Equity investments measured at net asset value, unrealized losses, more than 12 months	(236)	(247)
Equity investments measured at net asset value, fair value	5,147	5,076
Equity investments measured at net asset value, unrealized losses	(236)	(247)
Total investment securities, fair value, less than 12 months	10,914	27,253
Total investment securities, unrealized losses, less than 12 months	(20)	(153)
Total investment securities, fair value, more than 12 months	44,263	58,891
Total investment securities, unrealized losses, more than 12 months	(1,072)	(1,431)
Total investment securities, fair value	55,177	86,144
Total investment securities, unrealized losses	(1,092)	(1,584)
US Government Agencies Debt Securities [Member]
Debt securities, fair value, less than 12 months	10,914	25,988
Debt securities, unrealized losses, less than 12 months	(20)	(126)
Debt securities, fair value, more than 12 months	18,009	30,899
Debt securities, unrealized losses, more than 12 months	(90)	(116)
Debt securities, fair value	28,923	56,887
Debt securities, unrealized losses	(110)	(242)
Collateralized Mortgage Backed Securities [Member]
Debt securities, fair value, less than 12 months		1,265
Debt securities, unrealized losses, less than 12 months		(27)
Debt securities, fair value, more than 12 months	21,107	22,916
Debt securities, unrealized losses, more than 12 months	(746)	(1,068)
Debt securities, fair value	21,107	24,181
Debt securities, unrealized losses	$ (746)	$ (1,095)