Condensed Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)
Balances, beginning at Jun. 30, 2019	$ 351,957	$ 279	$ 137,712	$ 239,476	$ (17,759)	$ (7,751)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	6,151	0	0	6,151	0	0
Other comprehensive income (loss)	(394)	0	0	0	0	(394)
Issuance of deferred shares	0	0	(7,813)	0	7,813	0
Treasury shares sold to Employee Stock Purchase Plan	83	0	13	0	70	0
Treasury shares purchased to satisfy tax withholding obligations	(3,394)	0	0	0	(3,394)	0
Stock-based compensation expense	3,024	0	3,024	0	0	0
Balances, ending at Sep. 30, 2019	357,427	279	132,936	245,627	(13,270)	(8,145)
Balances, beginning at Jun. 30, 2020	307,889	279	138,966	206,402	(29,385)	(8,373)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(3,037)	0	0	(3,037)	0	0
Other comprehensive income (loss)	404	0	0	0	0	404
Issuance of deferred shares	0	0	(8,435)	0	8,435	0
Treasury shares sold to Employee Stock Purchase Plan	82	0	(62)	0	144	0
Treasury shares purchased to satisfy tax withholding obligations	(1,536)	0	0	0	(1,536)	0
Stock-based compensation expense	2,218	0	2,218	0	0	0
Balances, ending at Sep. 30, 2020	$ 306,020	$ 279	$ 132,687	$ 203,365	$ (22,342)	$ (7,969)