Annual report pursuant to Section 13 and 15(d)

Equity Method Investments - Investment in Novasentis (Details)

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Equity Method Investments - Investment in Novasentis (Details) - USD ($)
$ in Thousands
12 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Schedule of Equity Method Investments [Line Items]    
Equity method investments $ 12,925 $ 12,016
Novasentis    
Schedule of Equity Method Investments [Line Items]    
Ownership percentage 28.00%  
Equity Method Investment, Other than Temporary Impairment $ 2,700  
Equity method investments $ 977 $ 2,870