CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2016	Mar. 31, 2016
Current assets:
Cash and cash equivalents	$ 87,526	$ 88,323
Short-term investments	48,657	41,474
Receivables (net of allowances of $416 at June 30, 2016 and $479 at March 31, 2016)	36,908	35,148
Inventories	35,640	35,131
Prepaid expenses and other current assets	4,040	6,351
Net deferred tax assets, current	4,810	4,810
Current assets of discontinued operations	61	961
Total current assets	217,642	212,198
Long-term investments	17,080	22,458
Investment in unconsolidated affiliates	5,670	2,705
Property and equipment, net	29,277	26,842
Intangible assets, net	1,286	1,324
Net deferred tax assets, non-current	4,293	3,903
Other assets	3,397	1,950
Total assets	278,645	271,380
Current liabilities:
Accounts payable	8,390	7,292
Accrued payroll and related expenses	7,930	8,349
Accrued taxes	1,958	1,145
Current liabilities of discontinued operations	57	112
Other accrued liabilities	9,293	9,393
Deferred revenue	1,624	1,600
Warranty reserve	1,344	1,281
Total current liabilities	30,596	29,172
Non-current liabilities:
Deferred revenue	2,034	2,274
Warranty reserve	2,232	1,927
Net deferred tax liabilities	277	384
Notes payable, less current portion	354	379
Other non-current liabilities	990	932
Total non-current liabilities	5,887	5,896
Total liabilities	36,483	35,068
Commitments and contingencies (Note 12)
Shareholders' equity:
Preferred stock, no par value: 5,000,000 shares authorized; no shares issued and outstanding	0	0
Common stock, no par value: 35,000,000 shares authorized; 22,500,000 and 22,408,000 shares issued and outstanding at June 30, 2016 and March 31, 2016, respectively	128,667	127,016
Retained earnings	113,493	109,303
Accumulated other comprehensive gain (loss)	2	(7)
Total shareholders' equity	242,162	236,312
Total liabilities and shareholders' equity	$ 278,645	$ 271,380