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
Jun. 30, 2016
Jun. 30, 2015
Mar. 31, 2016
Property, Plant and Equipment      
Depreciation expense $ 300 $ 300  
Total property, plant and equipment, gross 31,554   $ 31,695
Less accumulated depreciation (28,486)   (28,158)
Total property, plant and equipment, net 3,068   3,537
Machinery, rental equipment, equipment, automobiles and furniture      
Property, Plant and Equipment      
Total property, plant and equipment, gross 18,766   19,016
Leasehold improvements      
Property, Plant and Equipment      
Total property, plant and equipment, gross 9,855   9,855
Molds and tooling      
Property, Plant and Equipment      
Total property, plant and equipment, gross $ 2,933   $ 2,824