XML 42 R32.htm IDEA: XBRL DOCUMENT v3.8.0.1
Segment Information (Detail) - Major customers - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2018
Mar. 31, 2017
Sep. 30, 2017
Segment Reporting Information [Line Items]          
Segment Reporting, Disclosure of Major Customers 0.1 .1   .1  
percent of accounts receivable     10.00% 10.00%  
Customer A          
Segment Reporting Information [Line Items]          
Amount (in Dollars) $ 2.7 $ 3.7 $ 3.9 $ 6.6  
% of Total Revenues 12.00% 15.00% 9.00% 14.00%  
Accounts Receivable, Gross $ 2.7   $ 2.7   $ 2.4
concentration risk, percentage, accounts receivable 12.00%   12.00%   9.00%
Customer B          
Segment Reporting Information [Line Items]          
Amount (in Dollars) $ 2.9 $ 3.8 $ 5.4 $ 6.0  
% of Total Revenues 13.00% 15.00% 12.00% 13.00%  
Accounts Receivable, Gross $ 6.6   $ 6.6   $ 3.9
concentration risk, percentage, accounts receivable 29.00%   29.00%   14.00%
Customer C [Member]          
Segment Reporting Information [Line Items]          
Accounts Receivable, Gross $ 2.7   $ 2.7    
concentration risk, percentage, accounts receivable 12.00%   12.00%