Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details 2)

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Summary of Significant Accounting Policies Summary of Significant Accounting Policies (Details 2) - USD ($)
$ in Thousands
Mar. 31, 2017
Mar. 31, 2016
Property, Plant and Equipment [Line Items]    
Land $ 672 $ 672
Machinery and equipment 1,698 2,106
Office, computer and research equipment 6,012 6,761
Leasehold improvements 7,680 7,659
Land, property and equipment, gross 16,062 17,198
Less accumulated depreciation and amortization (14,078) (13,221)
Land, property and equipment, net $ 1,984 $ 3,977