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 6 Months Ended
Sep. 30, 2015
Sep. 30, 2014
Sep. 30, 2015
Sep. 30, 2014
Mar. 31, 2015
Property, Plant and Equipment          
Depreciation expense $ 300 $ 300 $ 600 $ 600  
Total property, plant and equipment, gross 33,211   33,211   $ 34,355
Less accumulated depreciation (29,079)   (29,079)   (30,832)
Total property, plant and equipment, net 4,132   4,132   3,523
Machinery, rental equipment, equipment, automobiles and furniture          
Property, Plant and Equipment          
Total property, plant and equipment, gross 20,185   20,185   20,873
Leasehold improvements          
Property, Plant and Equipment          
Total property, plant and equipment, gross 9,835   9,835   9,760
Molds and tooling          
Property, Plant and Equipment          
Total property, plant and equipment, gross $ 3,191   $ 3,191   $ 3,722