CONDENSED CONSOLIDATED STATEMENTS OF INCOME (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Condensed Consolidated Statements Of Income
Service revenue	$ 27,826	$ 23,101	$ 54,325	$ 45,291
Product revenue	2,989	2,194	5,741	4,274
Total revenue	30,815	25,295	60,066	49,565
Operating expenses:
Cost of service revenue	5,209	5,216	9,995	10,294
Cost of product revenue	3,783	2,672	7,130	5,382
Research and development	2,640	2,030	4,976	3,856
Sales and marketing	13,745	10,800	26,817	21,068
General and administrative	3,125	2,054	5,897	4,107
Gain on patent sale	0	0	0	(11,965)
Total operating expenses	28,502	22,772	54,815	32,742
Income from operations	2,313	2,523	5,251	16,823
Other income, net	1	9	16	17
Income from continuing operations before provision for income taxes	2,314	2,532	5,267	16,840
Provision for income taxes	826	935	1,787	6,680
Income from continuing operations	1,488	1,597	3,480	10,160
Income from discontinued operations, net of income tax provision	154	144	301	198
Gain on disposal of discontinued operations, net of income tax provision of $463	589	0	589	0
Net income	$ 2,231	$ 1,741	$ 4,370	$ 10,358
Income per share - continuing operations:
Basic	$ 0.02	$ 0.02	$ 0.05	$ 0.15
Diluted	$ 0.02	$ 0.02	$ 0.05	$ 0.14
Income per share - discontinued operations:
Basic	$ 0.01	$ 0.00	$ 0.01	$ 0.00
Diluted	$ 0.01	$ 0.00	$ 0.01	$ 0.00
Net income per share:
Basic	$ 0.03	$ 0.02	$ 0.06	$ 0.15
Diluted	$ 0.03	$ 0.02	$ 0.06	$ 0.14
Weighted average number of shares:
Basic	72,970	71,261	72,788	70,989
Diluted	76,232	74,558	76,035	74,210