CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Mar. 31, 2013
Current assets:
Cash and cash equivalents	$ 172,114	$ 50,305
Short-term investments	1,901	1,964
Accounts receivable, net	5,169	3,880
Inventory	828	511
Deferred cost of goods sold	215	182
Deferred tax asset	4,532	6,096
Other current assets	1,999	732
Total current assets	186,758	63,670
Property and equipment, net	7,485	6,673
Intangible assets, net	15,606	10,194
Goodwill	38,235	25,150
Non-current deferred tax asset	47,366	46,352
Other assets	1,101	572
Total assets	296,551	152,611
Current liabilities:
Accounts payable	6,497	5,644
Accrued compensation	5,311	3,629
Accrued warranty	634	452
Accrued taxes	2,109	1,912
Deferred revenue	3,208	1,236
Other accrued liabilities	1,711	862
Total current liabilities	19,470	13,735
Non-current liabilities	1,672	1,817
Other non-current liabilities	12	26
Total liabilities	21,154	15,578
Commitments and contingencies (Note 8)
Stockholders' equity:
Common stock	88	72
Additional paid-in capital	379,802	246,176
Accumulated other comprehensive income (loss)	227	(36)
Accumulated deficit	(104,720)	(109,179)
Total stockholders' equity	275,397	137,033
Total liabilities and stockholders' equity	$ 296,551	$ 152,611