Quarterly report pursuant to Section 13 or 15(d)

Joint Venture - Additional Information (Detail)

v3.8.0.1
Joint Venture - Additional Information (Detail)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2018
USD ($)
Mar. 31, 2018
USD ($)
Schedule of Equity Method Investments [Line Items]    
Equity method investment $ 630 $ 630
Earnings from equity method investment $ 230 $ 230
Joint Ventures [Member]    
Schedule of Equity Method Investments [Line Items]    
Partnership interest 50.00% 50.00%
Equity method investment description of principal activities   share revenue and expenses on a 50/50 basis.
Equity method investment $ 400 $ 400
Earnings from equity method investment $ 200 $ 200