2. NET INCOME (LOSS) PER COMMON SHARE (Details) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended								12 Months Ended
	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2013
Net income (loss) per share:
Net income (loss)	$ (2,730)	$ 148	$ (950)	$ (1,446)					$ (4,978)	$ (6,189)	$ 3,846
Weighted average shares-Basic									25,029	27,505	27,124
Dilutive effect of employee stock options											940
Dilutive effect of employee stock purchase plan options											13
Weighted average shares-Dilutive									25,029	27,505	28,077
Net income (loss) per common share - Basic	$ (0.12)	$ 0.01	$ (0.04)	$ (0.05)	$ (0.20)	$ (0.03)	$ 0.01	$ (0.02)	$ (0.20)	$ (0.23)	$ 0.14
Net income (loss) per common share - Diluted	$ (0.12)	$ 0.01	$ (0.04)	$ (0.05)	$ (0.20)	$ (0.03)	$ 0.01	$ (0.02)	$ (0.20)	$ (0.23)	$ 0.14