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3. BALANCE SHEET DETAIL - Intangible assets (Details) - USD ($)
 3 Months Ended 9 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2016
Dec. 31, 2015
Mar. 31, 2016
Gross Carrying Amount $ 4,890,000   $ 4,890,000   $ 4,890,000
Accumulated Amortization (1,509,000)   (1,509,000)   (1,239,000)
Net Carrying Amount 3,381,000   3,381,000   3,651,000
Amortization of intangible assets 78,000 $ 63,000 270,000 $ 145,000  
Product designs          
Gross Carrying Amount 590,000   590,000   590,000
Accumulated Amortization (590,000)   (590,000)   (555,000)
Net Carrying Amount         35,000
Patents          
Gross Carrying Amount 4,220,000   4,220,000   4,220,000
Accumulated Amortization (839,000)   (839,000)   (604,000)
Net Carrying Amount 3,381,000   3,381,000   3,616,000
Software.          
Gross Carrying Amount 80,000   80,000   80,000
Accumulated Amortization $ (80,000)   $ (80,000)   $ (80,000)