Annual report pursuant to Section 13 and 15(d)

Segment Information (Details 2)

v3.8.0.1
Segment Information (Details 2)
Mar. 31, 2018
Mar. 31, 2017
Verizon [Member]    
Segment Reporting Information [Line Items]    
Entity-wide Major Customer, Percent Accounts Receivable 36.20% 19.00%
AT&T [Member]    
Segment Reporting Information [Line Items]    
Entity-wide Major Customer, Percent Accounts Receivable 14.40% 22.40%
T-Mobile [Member]    
Segment Reporting Information [Line Items]    
Entity-wide Major Customer, Percent Accounts Receivable 8.40% 13.30%