CONSOLIDATED BALANCE SHEETS (USD $)	Mar. 31, 2014	Mar. 31, 2013
Current assets:
Cash and cash equivalents	$ 73,589,000	$ 54,910,000
Short-term investments	29,102,000	23,354,000
Receivables (net of allowances of $182 in 2014 and $319 in 2013)	28,833,000	40,005,000
Inventories	26,978,000	26,786,000
Prepaid expenses and other current assets	2,452,000	3,319,000
Net deferred tax assets, current	4,464,000	4,589,000
Total current assets	165,418,000	152,963,000
Long-term investments	18,491,000	17,000,000
Investment in unconsolidated affiliate	2,646,000	2,613,000
Property and equipment, net	27,176,000	25,330,000
Intangible assets, net	1,624,000	3,122,000
Net deferred tax assets, non-current	1,557,000	643,000
Other assets	74,000	92,000
Total assets	216,986,000	201,763,000
Current liabilities:
Accounts payable	6,111,000	8,123,000
Accrued payroll and related expenses	4,654,000	6,261,000
Accrued taxes	1,144,000	440,000
Other accrued liabilities	2,701,000	2,838,000
Deferred revenue	1,208,000	1,362,000
Warranty reserve	1,047,000	995,000
Total current liabilities	16,865,000	20,019,000
Non-current liabilities:
Deferred rent	768,000	729,000
Deferred revenue	4,035,000	3,750,000
Warranty reserve	821,000	389,000
Notes payable, less current portion	581,000	682,000
Total non-current liabilities	6,205,000	5,550,000
Total liabilities	23,070,000	25,569,000
Commitments and contingencies (Note 10)
Shareholders' equity:
Preferred stock, no par value: 5,000,000 shares authorized; no shares issued and outstanding in 2014 and 2013	0	0
Common stock, no par value: 35,000,000 shares authorized; 22,308,000 and 22,120,000 shares issued and outstanding in 2014 and 2013, respectively	124,603,000	121,019,000
Retained earnings	69,318,000	55,133,000
Accumulated other comprehensive income (loss)	(5,000)	42,000
Total shareholders' equity	193,916,000	176,194,000
Total liabilities and shareholders' equity	$ 216,986,000	$ 201,763,000