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Summary of Significant Accounting Policies (Narrative) (Details) | 12 Months Ended |  |
--- | --- | --- | ---
Dec. 31, 2018 USD ($) Segment | Dec. 31, 2017 USD ($) | Jan. 01, 2019 USD ($) | Jan. 01, 2018 USD ($)
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Cumulative effect adjustment to accumulated deficit | $ (277,373,000) | $ (281,124,000) |  |
Working capital deficit | 2,500,000 |  |  |
cash flows from operating activities | 7,470,000 | 1,182,000 |  |
Cash and cash equivalents | 4,268,000 | $ 2,109,000 |  |
Intangible assets impairment charges | 0 |  |  |
Goodwill impairment charges | $ 0 |  |  |
Corporate income tax rate | 21.00% | 35.00% |  |
Payment of contingent consideration | $ 2,617,000 | $ 897,000 |  |
Selling, General and Administrative Expenses [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Advertising and promotion expense | $ 800,000 | $ 500,000 |  |
ASC 606 [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Number of reporting segment | Segment | 1 |  |  |
Percentage of service revenue that is recognized over a period of time against total revenue | 4.00% |  |  |
Deferred revenue | $ 795,000 |  |  |
ASU 2016-02 [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Right of use assets |  |  | $ 1,100,000 |
Operating lease liability |  |  | $ 1,200,000 |
Difference Between Revenue Guidance in Effect Before and After Topic 606 [Member] | ASC 606 [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Cumulative effect adjustment to accumulated deficit |  |  |  | $ 0
NLEX [Member] |  |  |  |
Summary Of Significant Accounting Policies [Line Items] |  |  |  |
Fair value of liabilities | 0 |  |  |
Payment of contingent consideration | $ 2,600,000 |  |  |

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