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Revenue Recognition (Tables)
 3 Months Ended
Dec. 31, 2019
Revenue from Contract with Customer [Abstract]  
Schedule of Contract Assets and Contract Liabilities The following table summarizes the balances of the Company's unbilled receivables (contract assets), which are reported in Other current assets, and its customer advances (contract liabilities), which are reported in Accrued expenses.     
 
Sept 30, 2019
 
Dec 31, 2019
Unbilled receivables (contract assets)
 
$
456

 
 
422

Customer advances (contract liabilities)
 
(519
)
 
 
(569
)
      Net contract liabilities
 
$
(63
)
 
 
(147
)