Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 29, 2018	Dec. 30, 2017
Current assets:
Cash and cash equivalents	$ 110,951	$ 34,899
Marketable securities	40,841	82,130
Accounts receivable, net of allowances of $170 and $126, respectively	50,854	62,457
Inventories	61,915	52,860
Inventories-delivered systems	180	1,534
Prepaid expenses and other	6,140	6,234
Total current assets	270,881	240,114
Property, plant and equipment, net	47,900	44,810
Goodwill	26,372	10,232
Intangible assets, net	27,326	2,206
Deferred income tax assets	2,569	11,924
Other assets	582	413
Total assets	375,630	309,699
Current liabilities:
Accounts payable	16,540	13,857
Accrued payroll and related expenses	21,658	12,901
Deferred revenue	8,990	7,408
Other current liabilities	9,421	7,249
Income taxes payable	3,164	2,680
Total current liabilities	59,773	44,095
Deferred revenue	1,753	1,661
Income taxes payable	871	860
Deferred tax liability	162	179
Other long-term liabilities	219	521
Total liabilities	62,778	47,316
Commitments and contingencies (Note 10)
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: 24,372,193 and 24,628,722, respectively, issued and outstanding	24	26
Additional paid-in capital	247,983	255,368
Retained Earnings	67,402	9,113
Accumulated other comprehensive income	(2,557)	(2,124)
Total stockholders’ equity	312,852	262,383
Total liabilities and stockholders’ equity	$ 375,630	$ 309,699