Quarterly report pursuant to Section 13 or 15(d)

Warranty Provision (Details Textual)

v3.19.2
Warranty Provision (Details Textual) - USD ($)
3 Months Ended 12 Months Ended
Jun. 30, 2019
Mar. 31, 2019
Product Warranty Accrual, Balance Sheet Classification [Abstract]    
Non-cash warranty provision $ 75,774 $ 121,345