CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2015	Mar. 31, 2015
Current assets:
Cash and cash equivalents	$ 83,633	$ 107,015
Short-term investments	49,508	26,109
Receivables (net of allowances of $245 at September 30, 2015 and $247 at March 31, 2015)	30,398	29,015
Inventories	34,450	36,179
Prepaid expenses and other current assets	5,669	2,893
Net deferred tax assets, current	6,576	6,575
Current assets of discontinued operations	101	2,075
Total current assets	210,335	209,861
Long-term investments	22,088	24,181
Investment in unconsolidated affiliate	2,714	2,683
Property and equipment, net	27,260	27,316
Intangible assets, net	1,401	1,491
Net deferred tax assets, non-current	3,682	3,413
Non-current assets of discontinued operations	0	12
Other assets	661	107
Total assets	268,141	269,064
Current liabilities:
Accounts payable	7,710	7,277
Accrued payroll and related expenses	9,262	11,094
Accrued taxes	355	4,829
Current liabilities of discontinued operations	245	5,536
Other accrued liabilities	8,434	9,804
Deferred revenue	1,464	1,322
Warranty reserve	1,220	1,423
Total current liabilities	28,690	41,285
Non-current liabilities:
Deferred revenue	2,751	3,219
Warranty reserve	1,604	1,733
Net deferred tax liabilities	310	310
Notes payable, less current portion	430	480
Other non-current liabilities	1,833	1,843
Total non-current liabilities	6,928	7,585
Total liabilities	$ 35,618	$ 48,870
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; 22,717,000 and 22,539,000 shares issued and outstanding at September 30, 2015 and March 31, 2015, respectively	135,069	132,559
Retained earnings	97,461	87,643
Accumulated other comprehensive loss	(7)	(8)
Total shareholders' equity	232,523	220,194
Total liabilities and shareholders' equity	$ 268,141	$ 269,064