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Concentrations of Risks	3 Months Ended
Concentrations of Risks	Jun. 30, 2019
Risks and Uncertainties [Abstract]
Concentrations of Risks	Concentrations of Risks The Company sells to customers globally. Credit evaluations of its customers’ financial condition are performed periodically, and the Company generally does not require collateral from its customers. There were no customers’ accounts receivable balances exceeding 10% of gross accounts receivable at June 30, 2019 or March 31, 2019. Consistent with industry practice, the Company utilizes electronics distributors for a large percentage of its sales. Electronics distributors are an effective means to distribute the products to end-users and they accounted for 42.9% and 41.7% of the Company's net sales for the three months ended June 30, 2019 and 2018, respectively. One of the Company's customers, TTI, Inc., an electronics distributor, accounted for over 10% of the Company’s net sales for the three months ended June 30, 2019 and 2018.