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Fair Value Measurements (Tables)
 9 Months Ended
May 31, 2018
Fair Value Disclosures [Abstract]  
Estimated fair value and carrying value of debt instruments
The estimated fair value and carrying value of our outstanding debt instruments (excluding the carrying value of equity and mezzanine equity components of our convertible notes) were as follows:
As of
 
May 31, 2018
 
August 31, 2017
 
 
Fair
Value
 
Carrying
Value
 
Fair
Value
 
Carrying
Value
Notes and MMJ Creditor Payments
 
$
4,870

 
$
4,808

 
$
8,793

 
$
8,423

Convertible notes
 
4,734

 
1,585

 
3,901

 
1,521