XML 53 R43.htm IDEA: XBRL DOCUMENT v3.19.1
Stock-based Compensation, Equity Grants, and Warrants - Stock Option Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 6 Months Ended 12 Months Ended
Mar. 31, 2019
Sep. 30, 2018
Number of Shares    
Outstanding at the beginning of the period (in shares) 2,134  
Granted (in shares) 35  
Exercised (in shares) (35)  
Outstanding at the end of the period (in shares) 2,134 2,134
Weighted Average Exercise Price    
Outstanding at the beginning of the period (in dollars per share) $ 4.33  
Granted (in dollars per share) 5.25  
Exercised (in dollars per share) 1.12  
Outstanding at the end of the period (in dollars per share) $ 4.36 $ 4.33
Weighted Average Remaining Contractual Term    
Weighted Average Remaining Contractual Term 6 years 2 months 12 days 6 years 2 months 12 days
Aggregate Intrinsic Value    
Outstanding at the beginning of the period (in dollars) $ 5,103  
Outstanding at the end of the period (in dollars) $ 8,056 $ 5,103