CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	3 Months Ended
Apr. 01, 2017	Mar. 26, 2016
Cash flows from operating activities
Net income (loss)	$ 824	$ 6,755
Income from discontinued operations, net of tax	0	7,878
Income (loss) from continuing operations	824	(1,123)
Adjustments to reconcile net income (loss) from continuing operations to net cash provided by operating activities:
Stock-based compensation	1,603	1,368
Depreciation and amortization	601	1,169
Deferred taxes	146	0
Foreign currency remeasurement gain	240	24
Other non-cash operating income	0	(56)
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable	(2,986)	2
Unbilled accounts receivable	679	(231)
Prepaid expenses and other current assets	(921)	(465)
Accounts payable	(707)	19
Accrued expenses and other current liabilities	1,625	558
Deferred revenue	3,462	1,437
Other non-current liabilities	19	154
Net cash provided by operating activities by continuing operations	4,585	2,856
Net cash provided by operating activities by discontinued operations	0	2,602
Net cash provided by operating activities	4,585	5,458
Cash flows from investing activities
Purchases of property and equipment	(271)	(26)
Payments for acquisitions, net of cash acquired	0	(420)
Purchase of short-term investment	(15,000)	0
Sale of short-term investment	15,000	0
Net cash used in investing activities	(271)	(446)
Cash flows from financing activities
Proceeds from exercise of common stock options	1,330	579
Net cash provided by financing activities by continuing operations	1,330	579
Net cash used in financing activities by discontinued operations	0	(14,510)
Net cash provided by (used in) financing activities	1,330	(13,931)
Effect of exchange rate changes on cash and cash equivalents	(421)	(29)
Net increase (decrease) in cash and cash equivalents	5,223	(8,948)
Cash and cash equivalents, beginning of the period	61,094	61,240
Cash and cash equivalents, end of the period	66,317	52,292
Supplemental disclosure of cash flow activities
Cash paid for taxes	0	68
Supplemental disclosure of non-cash operating, investing and financing activities
Unpaid purchases of property and equipment	35	9
Series A Redeemable Convertible Preferred Stock dividend accretion	602	0
Fair value of common shares received from legal settlement (Note 3)	$ 0	$ 2,593

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