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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (unaudited) - USD ($) $ in Thousands | 6 Months Ended
--- | ---
Jun. 30, 2016 | Jun. 30, 2015
Cash flows provided by (used in) operating activities: |  |
Net income (loss) | $ (8,251) | $ 1,536
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities: |  |
Depreciation and amortization of property and equipment | 448 | 549
Amortization of intangibles | 5 | 15
Stock-based compensation | 3,589 | 2,969
Allowance for doubtful accounts | 2 | 3
Loss on sale disposal of equipment | 0 | 10
Income from discontinued operations | 649 | 0
Changes in operating assets and liabilities: |  |
Accounts and other receivables | (460) | 1,918
Deferred income taxes | (6,472) | 4,766
Prepaid income taxes | 1,998 | (3,718)
Prepaid expenses and other current assets | (150) | (1,289)
Other operating assets | (103) | (22)
Accounts payable | 1,935 | 573
Accrued compensation and other current liabilities | (1,056) | 1,277
Deferred revenue | (2,107) | 7,895
Other long-term liabilities | (217) | 192
Net cash provided by (used in) operating activities | (11,488) | 16,674
Cash flows provided by investing activities: |  |
Purchases of short-term investments | (19,886) | (4,994)
Proceeds from maturities of short-term investments | 24,000 | 29,000
Purchases of property and equipment | (110) | (3,289)
Proceeds from discontinued operations | 1,000 | 0
Net cash provided by investing activities | 5,004 | 20,717
Cash flows provided by financing activities: |  |
Issuance of common stock under employee stock purchase plan | 128 | 190
Exercise of stock options | 1,677 | 675
Net cash provided by financing activities | 1,805 | 865
Net increase (decrease) in cash and cash equivalents | (4,679) | 38,256
Cash and cash equivalents: |  |
Beginning of period | 25,013 | 14,380
End of period | 20,334 | 52,636
Supplemental disclosure of cash flow information |  |
Cash paid for taxes | (473) | 90
Supplemental disclosure of noncash operating, investing, and financing activities |  |
Amounts accrued for property and equipment | 8 | 1,052
Release of Restricted Stock Units and Awards under company stock plan | $ 1,945 | $ 2,647

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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=66902209&loc=d3e3213-108585 + Details
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- Definition The cash inflow associated with the amount received from holders to acquire the entity's shares under incentive and share awards other than stock option exercises. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately. + References No definition available. + Details
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- Definition The cash inflow associated with the aggregate amount received by the entity through sale or maturity of marketable securities (held-to-maturity or available-for-sale) during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 45 -Paragraph 11 -URI http://asc.fasb.org/extlink&oid=66010992&loc=d3e26853-111562 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (a),(b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3179-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 + 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 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 Reference 2: 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=66902209&loc=d3e3602-108585 + 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=66902209&loc=d3e3602-108585 + Details
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- Definition The fair value of stock issued in noncash financing activities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4332-108586 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4304-108586 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=6367179&loc=d3e4313-108586 + Details
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- References No definition available. + Details
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