Quarterly report pursuant to Section 13 or 15(d)

Discontinued Operations - Carrying amounts of assets and liabilities (Details)

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Discontinued Operations - Carrying amounts of assets and liabilities (Details) - USD ($)
Aug. 31, 2021
Feb. 28, 2021
Aug. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Total current assets   $ 821,000 $ 1,030,000
Total current liabilities   1,620,000 $ 1,746,000
Disposal by sale | Overall business      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]      
Deposits - workers' compensation $ 1,030,000 821,000  
Total current assets 1,030,000 821,000  
Deposits - workers' compensation 2,582,000 2,071,000  
Total assets 3,612,000 2,892,000  
Accrued workers' compensation cost 1,746,000 1,620,000  
Total current liabilities 1,746,000 1,620,000  
Accrued workers' compensation cost 4,377,000 4,085,000  
Total liabilities 6,123,000 5,705,000  
Net liability $ (2,511,000) $ (2,813,000)