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Nature of Operations, Management's Plans and Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Dec. 31, 2018
Dec. 31, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Cash on hand $ 16.0 $ 29.1   $ 22.5 $ 20.0
Working capital   17.0      
Net losses 4.7 37.0 $ 20.6 20.6  
Deferred revenue, current   10.1   9.2  
Share-based compensation 1.6 9.0 $ 7.4    
Federal depository insurance coverage   0.3      
Unbilled accounts receivable   15.3   10.8  
Research and development costs $ 0.8 3.8   4.8  
Impairment charge       7.7  
Equity method investments   0.7      
Operating lease, Right of use asset   9.4    
Operating lease liabilities   8.8      
Operating lease liabilities current   3.6    
Operating lease liabilities noncurrent   $ 5.2    
Noncontrolling interest   40.00%      
Unbilled Accounts Receivable [Member]          
Impairment charge       0.6  
Trade Receivable [Member]          
Impairment charge       0.3  
Prepaid Expenses and Other Current Assets [Member]          
Impairment charge       1.9  
Software [Member]          
Impairment charge       $ 4.9  
Greece [Member]          
Cash on hand   $ 5.0