Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 27, 2014		Sep. 28, 2013
Operating activities:
Net income	$ 1,274		$ 1,819
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	307		364
Change in fair value of earn-out liability	303		181
Stock-based compensation expense	722		511
Provision for doubtful accounts	49		60
Changes in operating assets and liabilities:
Accounts receivable	(282)		(323)
Inventories	1,001		(1,963)
Prepaid expenses and other current assets	28		595
Other long-term assets	65		54
Accounts payable	(436)		(28)
Accrued compensation	(389)		(25)
Accrued expenses	(73)		35
Accrued warranty	70		19
Deferred revenue	42		58
Other long-term liabilities	(21)
Net cash provided by operating activities	2,660		1,357
Investing activities:
Acquisition of property and equipment	(472)		(235)
Payment on earn-out liability	(361)		(287)
Net cash used in investing activities	(833)		(522)
Financing activities:
Proceeds from stock option exercises	1,182		1,077
Repurchase of common stock	(3,411)		(194)
Payment of legal costs in connection with tender offer			(40)
Net cash (used in) provided by financing activities	(2,229)		843
Net cash provided by investing activities from discontinued operations			510
Net cash provided by discontinued operations			510
Net (decrease) increase in cash and cash equivalents	(402)		2,188
Cash and cash equivalents, beginning of period	13,444	[1]	11,901
Cash and cash equivalents, end of period	13,042		14,089
Cash paid during the period for:
Income taxes	47		12
Supplemental non-cash financing activities:
Preferred stock conversion into common stock			$ 5

[1] Derived from the audited consolidated financial statements included in the Annual Report on Form 10-K filed with the SEC for the year ended December 28, 2013.