Quarterly report pursuant to Section 13 or 15(d)

Summary of significant accounting policies - Additional Information (Details)

v3.21.1
Summary of significant accounting policies - Additional Information (Details) - USD ($)
 1 Months Ended 3 Months Ended 6 Months Ended
Mar. 31, 2021
Feb. 28, 2021
Feb. 29, 2020
Feb. 28, 2021
Feb. 29, 2020
Dec. 31, 2020
Nov. 30, 2020
Aug. 31, 2020
Jan. 01, 2020
Summary of significant accounting policies                  
Cash in excess by FDIC   $ 3,238,000   $ 3,238,000          
Working capital adjustment $ 2,600,000                
Additional potential claims and reserves 2,900,000                
Total reserve 5,500,000                
General reserve 2,900,000                
Gross note receivable 9,500,000                
Settlement claims       $ 500,000          
Concentration of credit Risk description       No individual client represented more than 10% of revenues for the three months and six months ended February 28, 2021 and February 29, 2020, respectively.          
Concentration of credit risk percent       94.00%          
Short-term asset and workers compensation - deposits   300,000   $ 300,000          
Long-term asset and workers compensation - deposits   600,000   600,000          
Short term accrued workers compensation   500,000   500,000          
Long term accrued workers compensation   1,200,000   1,200,000          
Short term assets   800,000   800,000          
Short term liabilities   1,600,000   1,600,000          
Long term assets   2,100,000   2,100,000          
Long term liabilities   4,100,000   4,100,000          
Discount rate (as a percent)           15.00% 15.00% 15.00% 10.00%
Working capital changes $ 10,700,000                
Research and developments costs   1,400,000 $ 800,000 2,800,000 $ 2,100,000        
Capitalized computer software cost   0 0 0 0        
Advertising cost, net   $ 719,000 $ 179,000 $ 921,000 $ 183,000