XML 58 R45.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 4 - Property, Plant and Equipment (Details Textual) - USD ($)
12 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Depreciation, Total $ 2,542,000 $ 2,287,000 $ 1,387,000