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2. NET INCOME (LOSS) PER COMMON SHARE (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Jun. 30, 2017
Jun. 30, 2016
NET INCOME (LOSS) PER COMMON SHARE    
Net loss $ (1,512) $ 260
Weighted average shares-Basic 20,805 21,299
Dilutive effect of employee stock options   223
Dilutive effect of employee stock purchase plan options   4
Weighted average shares-Dilutive 20,805 21,526
Net loss per common share - Basic $ (0.07) $ 0.01
Net loss per common share - Diluted $ (0.07) $ 0.01