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Marketable Securities (Details) - Schedule of amortized cost and estimated fair value of held-to-maturity securities - USD ($)
$ in Thousands
4 Months Ended
Dec. 31, 2021
Aug. 31, 2021
Short-term:    
Amortized cost $ 10,422 $ 11,271
Gross unrealized gains (losses) (144) 512
Estimated fair value 10,278 11,783
Commercial Bonds [Member]    
Short-term:    
Amortized cost 6,432 4,463
Gross unrealized gains (losses) (115) (98)
Estimated fair value $ 6,317 $ 4,365
Average yield to maturity rate 1.37% 1.73%
Accrued Interest [Member]    
Short-term:    
Amortized cost $ 115 $ 116
Gross unrealized gains (losses)
Estimated fair value 115 116
Long-term [Member]    
Short-term:    
Amortized cost 3,875 6,692
Gross unrealized gains (losses) (29) 610
Estimated fair value $ 3,846 $ 7,302
Average yield to maturity rate 1.20% 1.08%