Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2019	Jun. 30, 2019
Stockholders’ equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized	10,000,000	10,000,000
Preferred stock, shares issued	0	0
Preferred stock, shares outstanding	0	0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized	100,000,000	100,000,000
Common stock, shares issued	49,521,649	48,466,930
Common stock, shares outstanding	47,737,988	46,683,269
Treasury stock, shares	1,783,661	1,783,661