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Note 4 - Inventories - Inventories, Net of Reserves (Details) - USD ($)
$ in Thousands
Jun. 30, 2018
Apr. 01, 2018
Mar. 31, 2018
Raw materials $ 1,147   $ 2,290
Work-in-progress 1,749   2,100
Finished goods 81   561
Demonstration inventory 461   536
Total $ 3,438 $ 3,906 $ 5,487 [1]
[1] Derived from the audited consolidated financial statements as of and for the fiscal year ended March 31, 2018.