XML 20 R46.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Accrued Expenses (Details) - USD ($)
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Accrued Expenses      
Warranty $ 606,680 $ 854,952 $ 1,013,461
Salary, benefits and payroll taxes 212,322 143,183  
Professional fees 153,298 203,823  
Other 138,618 261,063  
Total accrued expenses $ 1,110,918 $ 1,463,021