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Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified | 9 Months Ended
--- | ---
Sep. 28, 2013 | Sep. 29, 2012
Operating activities: |  |  |
Net income | $ 1,819 |  | $ 1,196
Less income from discontinued operations | 0 |  | 1,619
Income (loss) from continuing operations | 1,819 |  | (423)
Adjustments to reconcile net income (loss) from continuing operations to net cash provided by (used in) operating activities: |  |  |
Depreciation and amortization | 364 |  | 310
Change in fair value of earn-out liability | 181 |  | 195
Stock compensation expense | 511 |  | 277
Provision for doubtful accounts | 60 |  | (24)
Changes in operating assets and liabilities, net of assets and liabilities acquired: |  |  |
Accounts receivable | (323) |  | 79
Inventories | (1,963) |  | (883)
Prepaid expenses and other current assets | 595 |  | (653)
Other long-term assets | 54 |  | (20)
Accounts payable | (28) |  | (51)
Accrued compensation | (25) |  | 807
Accrued expenses | 35 |  | (999)
Accrued warranty | 19 |  | (28)
Deferred revenue | 58 |  | (153)
Other long-term liabilities | 0 |  | 21
Net cash provided by (used in) operating activities | 1,357 |  | (1,545)
Investing activities: |  |  |
Acquisition of property and equipment | (235) |  | (310)
Payment on earn-out liability | (287) |  | (241)
Net cash used in investing activities | (522) |  | (551)
Financing activities: |  |  |
Proceeds from stock option exercises | 1,077 |  | 405
Repurchase of common stock | (194) |  | (578)
Payment of legal costs in connection with tender offer | (40) |  | 0
Net cash provided by (used in) financing activities | 843 |  | (173)
Net cash provided by operating activities from discontinued operations | 0 |  | 547
Net cash provided by investing activities from discontinued operations | 510 |  | 4,632
Effect of foreign exchange rate changes from discontinued operations | 0 |  | 35
Net cash provided by discontinued operations | 510 |  | 5,214
Net increase in cash and cash equivalents | 2,188 |  | 2,945
Cash and cash equivalents, beginning of period | 11,901 | [1] | 10,789
Cash and cash equivalents, end of period | 14,089 |  | 13,734
Cash paid during the period for: |  |  |
Income taxes | 12 |  | 29
Non-cash financing transaction: |  |  |
Preferred stock conversion into common stock | $ 5 |  | $ 0
[1] | Derived from the audited consolidated financial statements included in the annual report filed on Form 10-K with the SEC for the year ended December 29, 2012.

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- Definition The cash outflow to reacquire common stock during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 15 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3291-108585 + Details
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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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- Definition Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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