Annual report pursuant to Section 13 and 15(d)

Segment Information (Details 1)

v3.19.1
Segment Information (Details 1)
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Verizon [Member]    
Revenue, Major Customer [Line Items]    
Percentage Of Net Revenue 23.10% 18.00%
AT&T [Member]    
Revenue, Major Customer [Line Items]    
Percentage Of Net Revenue 11.40% 12.50%