Quarterly report pursuant to Section 13 or 15(d)

Revenue from Contracts with Customers (Revenue by Geographic Area) (Details)

v3.19.2
Revenue from Contracts with Customers (Revenue by Geographic Area) (Details) - USD ($)
3 Months Ended 9 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenues $ 9,727,060 $ 5,501,730 $ 23,074,984 $ 10,661,215
United States [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenues 5,548,987 640,313 11,234,870 2,615,652
South Africa [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenues 260,644 1,791,100 494,136 2,823,970
Zimbabwe [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenues 610,004 372,000 2,558,308 1,049,500
Other Countries [Member]        
Revenues from External Customers and Long-Lived Assets [Line Items]        
Revenues $ 3,307,425 $ 2,698,317 $ 8,787,670 $ 4,172,093