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Summary of Significant Accounting Policies Significant Accounting Policies (Details) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014 | Dec. 31, 2014
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Adjustment to gross profit |  | $ 600,000 |  | $ 1,100,000 |
Internal-use software development costs capitalized |  |  | $ 233,000 | 1,623,000 |
Tangible Asset Impairment Charges | $ 0 | 2,130,000 | 0 | 2,130,000 |
Treasury money market funds, at fair value | 122,900,000 |  | 122,900,000 |  | $ 135,300,000
Short-term Investments | 11,197,000 |  | 11,197,000 |  | $ 0
Line of Credit Facility, Amount Outstanding | 0 |  | 0 |  |
Line of Credit Facility, Maximum Borrowing Capacity | 50,000,000 |  | 50,000,000 |  |
Unamortized Debt Issuance Expense | 100,000 |  | 100,000 |  |
Income Tax Expense (Benefit) | $ 370,000 | $ (1,240,000) | $ 480,000 | $ (1,800,000) |
Effective income tax rate | (2.00%) | 15.00% | (2.00%) | 10.00% |
Cloud-based product offerings [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Internal-use software development costs capitalized | $ 100,000 | $ 900,000 | $ 300,000 | $ 1,600,000 |
Capitalized Computer Software, Amortization |  | $ 200,000 | $ 0 | $ 300,000 |
Minimum [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  | 1 year |  |
Maximum [Member] |  |  |  |  |
Summary of Significant Accounting Policies [Line Items] |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period |  |  | 4 years |  |

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- Definition Amount of internal-use software development costs capitalized by the company in the period and included in property and equipment, net in the consolidated balance sheet. + References No definition available. + Details
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- Definition For each income statement presented, the amount charged to expense for amortization of capitalized computer software costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128487-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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