Quarterly report pursuant to Section 13 or 15(d)

Intangible Assets - Narrative (Details)

v3.10.0.1
Intangible Assets - Narrative (Details)
3 Months Ended 9 Months Ended
Aug. 31, 2018
USD ($)
Aug. 31, 2017
USD ($)
Aug. 31, 2018
USD ($)
product_line
Aug. 31, 2017
USD ($)
Finite-Lived Intangible Assets [Line Items]        
Number of product lines | product_line     10  
Amortization expense $ 135 $ 97 $ 329 $ 291
2019 384   384  
2020 223   223  
2021 223   223  
2022 50   50  
2023 $ 0   $ 0  
Patents        
Finite-Lived Intangible Assets [Line Items]        
Intangible asset useful life     17 years