Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Total	Rights Offering	Cumulative Effect Period of Adoption Adjustment	Common Stock	Common Stock Rights Offering	Additional Paid-In Capital	Additional Paid-In Capital Rights Offering	Retained Earnings (Deficit)	Retained Earnings (Deficit) Cumulative Effect Period of Adoption Adjustment	Treasury Stock
Balance at Jun. 30, 2018	$ 180,254			$ 469		$ 237,957		$ (51,360)		$ (6,812)
Balance (in shares) at Jun. 30, 2018				45,865,000
Net earnings (loss)	(12,440)							(12,440)
Shares issued or canceled in connection with employee stock incentive plans and related tax effect	1			$ (4)		5
Shares issued or canceled in connection with employee stock incentive plans and related tax effect (in shares)				815,000
Shares issued in connection with exercises of employee stock options	6					6
Shares issued in connection with exercises of employee stock options (in shares)				3,000
Share-based compensation expense	3,488					3,488
Balance at Jun. 30, 2019	171,309		$ (601)	$ 465		241,456		(63,800)	$ (601)	(6,812)
Balance (in shares) at Jun. 30, 2019				46,683,000
Net earnings (loss)	(166,328)							(166,328)
Shares issued in connection with exercises of employee stock options				$ (10)		10
Shares issued in connection with exercises of employee stock options (in shares)				658,000
Share-based compensation expense	2,555					2,555
Balance at Jun. 30, 2020	$ 6,935			$ 455		244,021		(230,729)		(6,812)
Balance (in shares) at Jun. 30, 2020	47,340,652			47,341,000
Net earnings (loss)	$ 2,982							2,982
Shares issued in connection with a rights offering		$ 59,959			$ 382		$ 59,577
Shares issued in connection with a rights offering (in shares)					38,182,000
Shares issued or canceled in connection with employee stock incentive plans and related tax effect	74			$ 25		49
Shares issued or canceled in connection with employee stock incentive plans and related tax effect (in shares)				682,000
Share-based compensation expense	1,851					1,851
Balance at Jun. 30, 2021	$ 71,801			$ 862		$ 305,498		$ (227,747)		$ (6,812)
Balance (in shares) at Jun. 30, 2021	86,204,572			86,205,000