Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Mar. 31, 2012
Current assets:
Cash and cash equivalents	$ 82,931	$ 97,587
Accounts receivable, net of allowances of $887 and $632, respectively	45,626	32,531
Inventories	12,239	15,710
Prepaid expenses	4,081	2,975
Other current assets	884	5,492
Total current assets	145,761	154,295
Property and equipment, net	15,543	16,504
Goodwill	14,128	15,198
Intangible assets, net	17,288	14,135
Other non-current assets	4,244	4,007
Total assets	196,964	204,139
Current liabilities:
Accounts payable	30,177	24,938
Deferred revenue	25,676	28,441
Accrued liabilities	17,481	23,983
Capital lease obligations, current	306	647
Total current liabilities	73,640	78,009
Deferred income taxes, non-current	4,002	5,135
Capital lease obligations, non-current	381	347
Other non-current liabilities	5,085	6,210
Commitments and contingencies (see Note 12)
Shareholders' equity:
Common shares, without par value, at $0.30 stated value; 80,000,000 shares authorized; 31,606,831 shares issued; and 22,145,915 and 21,875,850 shares outstanding at March 31, 2013 and 2012, respectively	9,482	9,482
Treasury shares, 9,460,916 and 9,730,981 at March 31, 2013 and 2012, respectively	(2,838)	(2,919)
Capital in excess of stated value	(14,267)	(16,032)
Retained earnings	122,578	123,876
Accumulated other comprehensive (loss) income	(1,099)	31
Total shareholders' equity	113,856	114,438
Total liabilities and shareholders' equity	$ 196,964	$ 204,139