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Commitments and Contingencies (Product Warranties) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Commitments And Contingencies Product Warranties Details        
Balance at beginning of period $ 342 $ 619 $ 339 $ 660
Accruals for warranties 77 15 175 68
Settlements (70) (96) (153) (190)
Adjustments (24) 0 (36) 0
Balance at end of period $ 325 $ 538 $ 325 $ 538