Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Apr. 30, 2015	Jul. 31, 2014
Current assets:
Cash and cash equivalents	$ 73,480	$ 59,269
Marketable securities	57,091us-gaap_MarketableSecuritiesCurrent	39,659us-gaap_MarketableSecuritiesCurrent
Accounts receivable-trade, net of allowances of $133 and $139, respectively	78,653us-gaap_AccountsReceivableNetCurrent	88,081us-gaap_AccountsReceivableNetCurrent
Accounts receivable-other	321	99
Inventories	63,772us-gaap_InventoryNet	69,670us-gaap_InventoryNet
Prepaid expenses and other current assets	7,525	9,308
Total current assets	280,842us-gaap_AssetsCurrent	266,086us-gaap_AssetsCurrent
Property and equipment, net	40,493us-gaap_PropertyPlantAndEquipmentNet	40,883us-gaap_PropertyPlantAndEquipmentNet
Intangible assets, net	11,397	11,565
Goodwill	43,900us-gaap_Goodwill	43,030us-gaap_Goodwill
Other assets	2,393us-gaap_OtherAssets	2,579us-gaap_OtherAssets
Total assets	379,025us-gaap_Assets	364,143us-gaap_Assets
Current liabilities:
Current portion of long-term debt	2,190us-gaap_LongTermDebtCurrent	3,831us-gaap_LongTermDebtCurrent
Accounts payable	28,616us-gaap_AccountsPayableCurrent	29,617us-gaap_AccountsPayableCurrent
Accrued expenses	37,744us-gaap_AccruedLiabilitiesCurrent	40,785us-gaap_AccruedLiabilitiesCurrent
Deferred revenue and customer advances	6,858	8,927
Total current liabilities	75,408us-gaap_LiabilitiesCurrent	83,160us-gaap_LiabilitiesCurrent
Term loan	24,631us-gaap_LongTermLoansPayable	46,917us-gaap_LongTermLoansPayable
Subordinated debt		18,000us-gaap_SubordinatedLongTermDebt
Other long-term liabilities	10,784us-gaap_OtherLiabilitiesNoncurrent	11,447us-gaap_OtherLiabilitiesNoncurrent
Stockholders' equity:
Common stock	2,727us-gaap_CommonStockValue	2,422us-gaap_CommonStockValue
Additional paid-in capital	807,481us-gaap_AdditionalPaidInCapital	751,511us-gaap_AdditionalPaidInCapital
Accumulated other comprehensive (loss)	(13,726)	(304)
Accumulated deficit	(528,280)	(549,010)
Total stockholders' equity	268,202us-gaap_StockholdersEquity	204,619us-gaap_StockholdersEquity
Total liabilities and stockholders' equity	$ 379,025	$ 364,143

Amount due from customers, clients, or other third-parties, or arising from transactions not separately disclosed, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

No definition available.