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Income Taxes - Additional Information (Details) - USD ($)
 12 Months Ended
Mar. 27, 2020
Jun. 30, 2021
Jun. 30, 2020
Investments Owned Federal Income Tax Note [Line Items]      
Loss before income taxes   $ (7,603,000) $ (8,311,000)
Effective tax rate for continuing operations   0.00%  
Current state tax expense   $ 0  
Unrecognized tax benefits   $ 329,000  
Federal statutory effective tax rate   21.00% 21.00%
Valuation allowance   $ 17,900,000  
Change in valuation allowance   $ 2,000,000  
Alternative minimum tax credit refunded, percentage   50.00%  
Alternative minimum tax credit refund   $ 429,000  
Net operating loss carryforwards   74,000,000  
Net losses carryforwards used for Federal income tax purposes   38,600,000  
Federal income tax effected   $ 8,100,000  
Percentage of limits on utilization of net operating losses of taxable income   80.00%  
Income tax credit carryovers   $ 500,000  
Accumulated state net operating loss carryforwards   7,400,000  
State income tax effected   300,000  
Temporary credit tax effected   400,000  
Temporary credit offset   13,000  
Interest expense for uncertain tax positions   0 $ 0
Federal | Research and Development      
Investments Owned Federal Income Tax Note [Line Items]      
Income tax credit carryovers   $ 800,000  
State and Local Jurisdiction      
Investments Owned Federal Income Tax Note [Line Items]      
Tax credit carryforward expiration year   2027  
Earliest Tax Year      
Investments Owned Federal Income Tax Note [Line Items]      
Operating loss carryforward expiration year   2020  
Earliest Tax Year | Federal | Research and Development      
Investments Owned Federal Income Tax Note [Line Items]      
Income tax credit carryovers expiration year   2035  
Earliest Tax Year | State and Local Jurisdiction      
Investments Owned Federal Income Tax Note [Line Items]      
Accumulated operating loss carryforward expiration year   2026  
Latest Tax Year      
Investments Owned Federal Income Tax Note [Line Items]      
Operating loss carryforward expiration year   2037  
Latest Tax Year | Federal | Research and Development      
Investments Owned Federal Income Tax Note [Line Items]      
Income tax credit carryovers expiration year   2041  
Latest Tax Year | State and Local Jurisdiction      
Investments Owned Federal Income Tax Note [Line Items]      
Accumulated operating loss carryforward expiration year   2038  
Indefinite Lives      
Investments Owned Federal Income Tax Note [Line Items]      
Net losses carryforwards used for Federal income tax purposes   $ 35,400,000  
Federal income tax effected   $ 7,400,000  
Maximum | CARES Act      
Investments Owned Federal Income Tax Note [Line Items]      
Percentage of refundable AMT credit 100.00%