Quarterly report pursuant to Section 13 or 15(d)

Land Property and Equipment (Details)

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Land Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2017
Mar. 31, 2017
Property, Plant and Equipment [Line Items]    
Land $ 672 $ 672
Machinery and equipment 1,603 1,698
Office, computer and research equipment 5,473 6,012
Leasehold improvements 1,275 7,680
Land, property and equipment, gross 9,023 16,062
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment 7,393 14,078
Land, property and equipment, net $ 1,630 $ 1,984