Quarterly report pursuant to Section 13 or 15(d)

Long term debt (Details)

v3.21.2
Long term debt (Details)
$ in Thousands, SFr in Millions
1 Months Ended 3 Months Ended
Nov. 30, 2018
USD ($)
Oct. 31, 2021
USD ($)
Apr. 30, 2020
CHF (SFr)
Debt Disclosure [Abstract]      
Debt instrument, face amount $ 4,500    
Debt instrument maturity period 10 years    
Debt instrument, interest rate, stated percentage 5.09%    
Debt instrument, periodic payment $ 30    
Amortization of debt issuance costs $ 72    
Unamortized debt issuance expense   $ 51  
Mortgage agreement   4,100  
Cash collateral for borrowed securities   750  
Liquid assets   $ 25,000  
Liquidity covenant description   (a) the liquidity covenant was reduced to 150% (or approximately $6 million at October 31, 2021) of the loan principal from $25 million previously, and (b) the collateral requirement would be increased from $0.75 million to $1.0 million. The Company was in compliance as to the liquidity covenant as of October 31, 2021 and increased the collateral deposit to $1.0 million in November.  
Foreign exchange rate amount   $ 400 SFr 0.4
Bear interest rate   0.00%  
Long term debt term   5 years