Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 26, 2015	Dec. 27, 2014
Current assets:
Cash and cash equivalents	$ 38,154	$ 34,676
Marketable securities	44,931	49,286
Accounts receivable, net of allowances of $150 and $253, respectively	37,832	26,121
Inventories	47,749	35,105
Inventories-delivered systems	2,856	1,912
Prepaid expenses and other	6,592	9,289
Deferred income tax assets		1,457
Total current assets	178,114	157,846
Property, plant and equipment, net	44,493	49,633
Goodwill	9,415	10,494
Intangible assets, net	1,867	4,294
Deferred income tax assets	1,118	410
Other assets	533	559
Total assets	235,540	223,236
Current liabilities:
Accounts payable	11,675	10,199
Accrued payroll and related expenses	10,097	8,700
Deferred revenue	12,790	10,021
Other current liabilities	8,878	8,265
Income taxes payable	1,771	1,017
Total current liabilities	45,211	38,202
Deferred revenue	827	2,591
Income taxes payable	775	701
Deferred tax liability	521	926
Other long-term liabilities	878	1,279
Total liabilities	$ 48,212	$ 43,699
Commitments and contingencies (Note 11)
Stockholders’ equity:
Preferred stock, $0.001 par value; 3,000,000 shares authorized; no shares issued or outstanding	$ 0	$ 0
Common stock, $0.001 par value, 47,000,000 shares authorized: 24,224,286 and 23,813,729, respectively, issued and outstanding	24	24
Additional paid-in capital	258,715	251,396
Accumulated deficit	(66,209)	(69,114)
Accumulated other comprehensive income	(5,202)	(2,769)
Total stockholders’ equity	187,328	179,537
Total liabilities and stockholders’ equity	$ 235,540	$ 223,236