Condensed Consolidated Statements Of Changes In Equity - USD ($) $ in Thousands	Total	Common And Treasury Stock [Member]	Treasury Stock [Member]	Number Of Shares, Net Of Treasury [Member]	Additional Paid-In Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Loss [Member]	Parent [Member]	Noncontrolling Interest [Member]
Balance, Number of Shares at Jun. 30, 2020		82,010,217	(24,891,292)	57,118,925
Balance at Jun. 30, 2020	$ 290,213	$ 80	$ (286,951)		$ 301,489	$ 444,670	$ (169,075)	$ 290,213	$ 0
Redeemable Common Stock, Balance at Jun. 30, 2020	84,979
Exercise of stock option (Note 12)	$ 53	$ 0		$ 17,335	53			53
Exercise of stock option (Note 12), shares	17,335	17,335
Stock-based compensation charge (Note 12)	$ 1,173				1,173			1,173
Reversal of stock-based compensation charge (Note 12)	(297)				(297)			(297)
Reversal of stock-based compensation charge (Note 12), shares		(510,200)		(510,200)
Stock-based compensation charge related to equity-accounted investment (Note 5)	(40)				(40)			(40)
Proceeds from disgorgement of shareholders' short-swing profits (Note 21)	98				98			98
Net loss	(39,696)					(39,696)		(39,696)	0
Other comprehensive (loss) income (Note 11)	$ 22,901						22,901	22,901	0
Balance, Number of Shares at Mar. 31, 2021	56,626,060	81,517,352	(24,891,292)	56,626,060
Balance at Mar. 31, 2021	$ 274,405	$ 80	$ (286,951)		302,476	404,974	(146,174)	274,405	0
Redeemable Common Stock, Balance at Mar. 31, 2021	84,979
Balance, Number of Shares at Dec. 31, 2020		81,505,851	(24,891,292)	56,614,559
Balance at Dec. 31, 2020	285,261	$ 80	$ (286,951)		302,196	411,178	(141,242)	285,261	0
Redeemable Common Stock, Balance at Dec. 31, 2020	84,979
Exercise of stock option (Note 12)	35	$ 0			35			35
Exercise of stock option (Note 12), shares		11,501		11,501
Stock-based compensation charge (Note 12)	245				245			245
Reversal of stock-based compensation charge (Note 12)	0				0			0
Reversal of stock-based compensation charge (Note 12), shares		0		0
Net loss	(6,204)					(6,204)		(6,204)	0
Other comprehensive (loss) income (Note 11)	$ (4,932)						(4,932)	(4,932)	0
Balance, Number of Shares at Mar. 31, 2021	56,626,060	81,517,352	(24,891,292)	56,626,060
Balance at Mar. 31, 2021	$ 274,405	$ 80	$ (286,951)		302,476	404,974	(146,174)	274,405	0
Redeemable Common Stock, Balance at Mar. 31, 2021	84,979
Balance, Number of Shares at Jun. 30, 2021		81,607,912	(24,891,292)	56,716,620
Balance at Jun. 30, 2021	275,980	$ 80	$ (286,951)		301,959	406,613	(145,721)	275,980	0
Redeemable Common Stock, Balance at Jun. 30, 2021	84,979
Exercise of stock option (Note 12)	$ 760	$ 0			760			760
Exercise of stock option (Note 12), shares	249,521	249,521		249,521
Restricted stock granted (Note 12), shares		984,921		984,921
Stock-based compensation charge (Note 12)	$ 1,751				1,751			1,751
Reversal of stock-based compensation charge (Note 12)	(40)				(40)			(40)
Reversal of stock-based compensation charge (Note 12), shares		(30,000)		(30,000)
Stock-based compensation charge related to equity-accounted investment (Note 5)	0				0			0
Net loss	(28,727)					(28,727)		(28,727)	0
Other comprehensive (loss) income (Note 11)	$ 3,256						3,256	3,256	0
Balance, Number of Shares at Mar. 31, 2022	57,921,062	82,812,354	(24,891,292)	57,921,062
Balance at Mar. 31, 2022	$ 252,980	$ 80	$ (286,951)		304,430	377,886	(142,465)	252,980	0
Redeemable Common Stock, Balance at Mar. 31, 2022	84,979
Balance, Number of Shares at Dec. 31, 2021		82,548,464	(24,891,292)	57,657,172
Balance at Dec. 31, 2021	240,267	$ 80	$ (286,951)		303,804	381,213	(157,879)	240,267	0
Redeemable Common Stock, Balance at Dec. 31, 2021	84,979
Exercise of stock option (Note 12)	21				21			21
Exercise of stock option (Note 12), shares		6,668		6,668
Restricted stock granted (Note 12), shares		257,222		257,222
Stock-based compensation charge (Note 12)	619				619			619
Reversal of stock-based compensation charge (Note 12)	(5)				(5)			(5)
Reversal of stock-based compensation charge (Note 12), shares		0		0
Stock-based compensation charge related to equity-accounted investment (Note 5)	(9)				(9)			(9)
Net loss	(3,327)					(3,327)		(3,327)	0
Other comprehensive (loss) income (Note 11)	$ 15,414						15,414	15,414	0
Balance, Number of Shares at Mar. 31, 2022	57,921,062	82,812,354	(24,891,292)	57,921,062
Balance at Mar. 31, 2022	$ 252,980	$ 80	$ (286,951)		$ 304,430	$ 377,886	$ (142,465)	$ 252,980	$ 0
Redeemable Common Stock, Balance at Mar. 31, 2022	$ 84,979