Related Parties - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands		12 Months Ended
	Jun. 05, 2018	Jun. 30, 2018	Jun. 30, 2017
Related Party Transaction [Line Items]
Total cost of share purchased		$ 3,072	$ 641
Common Shares [Member]
Related Party Transaction [Line Items]
Purchase of common shares		1,816,000	281,000
Total cost of share purchased		$ 908	$ 141
Common Shares [Member] | Director [Member]
Related Party Transaction [Line Items]
Purchase of common shares	70
Repurchase of common shares per share	$ 1.40
Total cost of share purchased	$ 98
Management [Member]
Related Party Transaction [Line Items]
Legal services to these law firms		229	541
Amount payable to law firms		$ 10	$ 38