CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jul. 30, 2016	Apr. 30, 2016
Current assets:
Cash and cash equivalents	$ 122,313	$ 124,287
Short-term investments	101,802	103,404
Accounts receivable, net of allowance for doubtful accounts of $433 at July 30, 2016 and $262 at April 30, 2016	32,635	56,045
Unbilled receivables and retentions	14,493	18,899
Inventories, net	44,105	37,486
Income tax receivable	4,250
Prepaid expenses and other current assets	4,167	4,150
Total current assets	323,765	344,271
Long-term investments	33,097	33,859
Property and equipment, net	16,910	16,762
Deferred income taxes	15,104	15,016
Other assets	658	750
Total assets	389,534	410,658
Current liabilities:
Accounts payable	10,529	17,712
Wages and related accruals	9,934	13,973
Income taxes payable		943
Customer advances	2,416	2,544
Other current liabilities	12,708	11,173
Total current liabilities	35,587	46,345
Deferred rent	1,864	1,714
Capital lease obligations - net of current portion	357	449
Other non-current liabilities	184	184
Liability for uncertain tax positions	62	441
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.0001 par value: Authorized shares—10,000,000; none issued or outstanding
Common stock, $0.0001 par value: Authorized shares—100,000,000 Issued and outstanding shares—23,395,030 shares at July 30, 2016 and 23,359,925 at April 30, 2016	2	2
Additional paid-in capital	155,853	154,274
Accumulated other comprehensive loss	(183)	(201)
Retained earnings	195,808	207,450
Total stockholders' equity	351,480	361,525
Total liabilities and stockholders' equity	$ 389,534	$ 410,658