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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2014
Apr. 30, 2014
Inventories [Abstract]    
Raw materials and subassemblies $ 1,222 $ 1,082
Work-in-process 5 13
Finished Goods 22 303
Total $ 1,249 $ 1,398 [1]
[1] Derived from the consolidated audited financial statements included in the Company's Annual Report on Form 10-K for the fiscal year ended April 30, 2014 filed with the SEC.