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Accounts Receivable, Net
 12 Months Ended
Oct. 31, 2018
Receivables [Abstract]  
Accounts Receivable, Net

Note 3. Accounts Receivable, Net

Accounts receivable as of October 31, 2018 and 2017 consisted of the following (in thousands):

 

 

 

2018

 

 

2017

 

Commercial customers:

 

 

 

 

 

 

 

 

Amount billed

 

$

7,415

 

 

$

41,073

 

Unbilled receivables (1)

 

 

10,632

 

 

 

18,162

 

 

 

 

18,047

 

 

 

59,235

 

 

 

 

 

 

 

 

 

 

Advanced Technologies (including U.S.

   Government(2)):

 

 

 

 

 

 

 

 

Amount billed

 

 

1,865

 

 

 

1,934

 

Unbilled receivables

 

 

3,127

 

 

 

7,352

 

 

 

 

4,992

 

 

 

9,286

 

 

 

$

23,039

 

 

$

68,521

 

(1)

Additional long-term unbilled receivables of $9.4 million and $12.8 million are included within “Other Assets” as of October 31, 2018 and 2017, respectively. 

(2)

Total U.S. government accounts receivable, including unbilled receivables, outstanding as of October 31, 2018 and 2017 were $2.3 million and $3.2 million, respectively.

We bill customers for power plant and power plant component sales based on certain contractual milestones being reached.  We bill service agreements based on the contract price and billing terms of the contracts. Generally, our Advanced Technologies contracts are billed based on actual revenues recorded, typically in the subsequent month.  Some Advanced Technologies contracts are billed based on contractual milestones or costs incurred.  Unbilled receivables relate to revenue recognized on customer contracts that have not been billed.  Accounts receivable are presented net of an allowance for doubtful accounts of $0.2 million and $0.1 million as of October 31, 2018 and 2017, respectively.  Uncollectible accounts receivable are charged against the allowance for doubtful accounts when all collection efforts have failed and it is deemed unlikely that the amount will be recovered.

Accounts receivable from commercial customers (including unbilled receivables) included amounts due from POSCO Energy of $1.6 million and $6.2 million as of October 31, 2018 and 2017, respectively, and amounts due from NRG and NRG Yield of $2.2 million and $0.1 million as of October 31, 2018 and 2017, respectively.