Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment (Details)

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Property, Plant and Equipment (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2017
Dec. 31, 2016
Mar. 31, 2017
Property, Plant and Equipment          
Total property, plant and equipment, gross $ 29,656   $ 29,656   $ 30,393
Less accumulated depreciation (26,670)   (26,670)   (28,278)
Total property, plant and equipment, net 2,986   2,986   2,115
Depreciation expense 200 $ 300 600 $ 1,000  
Machinery, rental equipment, equipment, automobiles and furniture          
Property, Plant and Equipment          
Total property, plant and equipment, gross 15,891   15,891   17,657
Leasehold improvements          
Property, Plant and Equipment          
Total property, plant and equipment, gross 10,836   10,836   9,870
Molds and tooling          
Property, Plant and Equipment          
Total property, plant and equipment, gross $ 2,929   $ 2,929   $ 2,866