XML 40 R29.htm IDEA: XBRL DOCUMENT v3.20.2
Summary of Significant Accounting Policies (Details) - Deferred Revenue, by Arrangement, Disclosure
 3 Months Ended
Jun. 30, 2020
USD ($)
Deferred Revenue, by Arrangement, Disclosure [Abstract]  
Deferred revenues related to extended warranties $ 413,554
Additional extended warranties 0
Revenue recognized (22,140)
Deferred revenues related to extended warranties $ 391,414