Annual report pursuant to Section 13 and 15(d)

Income Taxes - Additional Information (Detail)

v3.21.2
Income Taxes - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Current and Future Income Taxes (Textual)    
Statutory income tax rate 21.00% 21.00%
Deferred tax assets, Operating loss carryforwards, Not subject to expiration $ 20,400  
Percentage of taxable income, limitation on NOLs 80.00%  
Investment tax credits expire, description expire between 2031 and 2040  
Current income tax expense (benefit) $ 0  
Open tax years 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021  
Represents minimum cumulative percentage of change in ownership as a condition to offset taxable income or tax 50.00%  
Cumulative change in ownership period 3 years  
United States [Member]    
Current and Future Income Taxes (Textual)    
Loss before income taxes $ 29,000  
Operating loss carryforwards $ 15,800  
Net operating loss expire, description begin expiring in 2026  
US and Canadian [Member]    
Current and Future Income Taxes (Textual)    
Operating loss carryforwards $ 77,700 $ 47,800
Canadian [Member]    
Current and Future Income Taxes (Textual)    
Loss before income taxes 9,200  
Operating loss carryforwards $ 41,500  
Net operating loss expire, description begin expiring in 2030  
Non-refundable federal investment tax credits $ 407 329
British Columbia [Member]    
Current and Future Income Taxes (Textual)    
Non-refundable federal investment tax credits $ 258 205
Investment tax credits expire, description expire between 2021 and 2030  
Canadian Scientific Research and Development [Member]    
Current and Future Income Taxes (Textual)    
Non-refundable federal investment tax credits $ 2,800 $ 2,200