Annual report pursuant to Section 13 and 15(d)

Segment Information (Details 1)

v3.20.1
Segment Information (Details 1)
12 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Verizon [Member]    
Revenue, Major Customer [Line Items]    
Percentage Of Net Revenue 9.90% 23.10%
AT&T [Member]    
Revenue, Major Customer [Line Items]    
Percentage Of Net Revenue 7.30% 11.40%