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Note 3 - Recent Accounting Pronouncements (Details Textual) - USD ($) | Jun. 30, 2018 | Jan. 01, 2018 | Dec. 31, 2017 | [1]
--- | --- | --- | --- | ---
Capitalized Contract Cost, Net, Total | $ 1,354,000 | $ 1,400,000 |
Retained Earnings (Accumulated Deficit), Ending Balance | 51,027,000 |  | $ 42,676,000
Deferred Tax Liabilities, Net, Noncurrent | 19,577,000 |  | $ 19,834,000
Difference between Revenue Guidance in Effect before and after Topic 606 [Member] | Accounting Standards Update 2014-09 [Member] |  |  |
Capitalized Contract Cost, Net, Total | (1,354,000) |  |
Retained Earnings (Accumulated Deficit), Ending Balance | (1,025,000) | (1,100,000) |
Deferred Tax Liabilities, Net, Noncurrent | $ (329,000) | $ (300,000) |
[1] | The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.

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