Consolidated Balance Sheets (Parentheticals) - $ / shares	Jun. 30, 2020	Jun. 30, 2019
Statement of Financial Position [Abstract]
Preferred stock par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock shares authorized (in shares)	10,000,000	10,000,000
Preferred stock shares issued (in shares)	0	0
Preferred stock shares outstanding (in shares)	0	0
Common stock par value (in dollars per share)	$ 0.01	$ 0.01
Common stock shares authorized (in shares)	60,000,000	60,000,000
Common stock shares issued (in shares)	17,021,372	17,984,105
Common stock shares outstanding (in shares)	17,021,372	17,984,105