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Earnings per Common Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended								12 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Basic EPS:
Net income (loss)	$ (10,723)	$ (12,873)	$ (4,591)	$ (3,037)	$ (5,722)	$ (5,495)	$ (28,008)	$ 6,151	$ (31,224)	$ (33,074)	$ 27,982
Weighted average shares outstanding									26,451	26,621	26,891
Basic earnings (loss) per common share (in dollars per share)	$ (0.40)	$ (0.49)	$ (0.17)	$ (0.12)	$ (0.22)	$ (0.21)	$ (1.04)	$ 0.23	$ (1.18)	$ (1.24)	$ 1.04
Diluted EPS:
Weighted average shares outstanding									26,451	26,621	26,891
Dilutive stock options									0	0	28
Dilutive nonvested deferred shares									0	0	668
Diluted weighted average shares									26,451	26,621	27,587
Diluted earnings (loss) per common share (in dollars per share)	$ (0.40)	$ (0.49)	$ (0.17)	$ (0.12)	$ (0.22)	$ (0.21)	$ (1.04)	$ 0.22	$ (1.18)	$ (1.24)	$ 1.01

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