Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Apr. 30, 2018	Jul. 31, 2017
Current assets:
Cash and cash equivalents	$ 123,939	$ 129,298
Short-term marketable securities	62,587	18,797
Accounts receivable, net of allowance for doubtful accounts of $346 and $752 as of April 30, 2018 and July 31, 2017, respectively	84,865	77,587
Inventory	132,240	130,575
Income tax receivable	2,649	4,686
Prepaid expenses and other current assets	8,751	9,762
Total current assets	415,031	370,705
Long-term marketable securities	35,765	26,171
Property, plant, and equipment, net	97,076	102,676
Intangible assets, net	22,010	25,925
Goodwill	2,344	2,344
Deferred income taxes	1,925	5,168
Other assets	5,918	5,094
Total assets	580,069	538,083
Current liabilities:
Accounts payable	37,738	27,179
Accrued employee compensation and benefits	21,711	18,171
Accrued income tax	877	708
Accrued warranty	5,081	5,306
Accrued restructuring charges	355	2,786
Deferred revenue	6,606	4,774
Customer deposits	3,068	3,538
Other current liabilities	5,144	4,648
Total current liabilities	80,580	67,110
Long-term liabilities:
Accrued income taxes, net of current portion	5,508	734
Other long-term liabilities	10,793	9,745
Total long-term liabilities	16,301	10,479
Guarantees, commitments and contingencies (Note 16)
Stockholders’ Equity:
Common stock, $0.05 par value; 30,000,000 shares authorized and 12,503,411 shares issued and outstanding as of April 30, 2018; 30,000,000 shares authorized and 12,467,824 shares issued and outstanding as of July 31, 2017	624	622
Capital in excess of par value	162,607	157,907
Retained earnings	322,664	307,104
Accumulated other comprehensive loss	(2,707)	(5,139)
Total stockholders’ equity	483,188	460,494
Total liabilities and stockholders’ equity	$ 580,069	$ 538,083