Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment (Details)

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Property, Plant and Equipment (Details) (USD $)
3 Months Ended 6 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Mar. 31, 2014
Property, Plant and Equipment          
Total property, plant and equipment, gross $ 34,563,000   $ 34,563,000   $ 35,534,000
Less accumulated depreciation (31,236,000)   (31,236,000)   (32,643,000)
Total property, plant and equipment, net 3,327,000   3,327,000   2,891,000
Depreciation expense 300,000 500,000 600,000 1,000,000  
Machinery, rental equipment, equipment, automobiles and furniture
         
Property, Plant and Equipment          
Total property, plant and equipment, gross 20,805,000   20,805,000   20,665,000
Leasehold improvements
         
Property, Plant and Equipment          
Total property, plant and equipment, gross 9,759,000   9,759,000   9,731,000
Molds and tooling
         
Property, Plant and Equipment          
Total property, plant and equipment, gross $ 3,999,000   $ 3,999,000   $ 5,138,000