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Note 2 - Summary of significant Accounting Policies (Details Textual) | 12 Months Ended
--- | ---
Dec. 31, 2016 USD ($) shares | Dec. 31, 2015 USD ($) shares
Number of Major United States Financial Institutions | 2 |
Depreciation, Depletion and Amortization | $ 291,000 | $ 299,000
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount | shares | 3,509,241 | 3,765,959
Period During Which Customer May Return Product Under Very Limited Circumstances | 30 days |
Maintenance and Support Revenue, Recognition Period | 1 year |
Period of Payment Terms Offered to Customers Distributions and Resellers Domestically | 30 days |
Period of Payment Terms Offered to Customers Distributors and Resllers Internationally | 45 days |
Period for Which Payment Terms can be Offered, Maximum | 1 year |
Allowance for Doubtful Accounts Receivable | $ 0 | $ 0
Income Tax Examination, Penalties and Interest Accrued | $ 0 | $ 0
Equipment and Furniture and Fixtures [Member] | Minimum [Member] |  |
Property, Plant and Equipment, Useful Life | 1 year |
Equipment and Furniture and Fixtures [Member] | Maximum [Member] |  |
Property, Plant and Equipment, Useful Life | 5 years |
Leasehold Improvements [Member] | Minimum [Member] |  |
Property, Plant and Equipment, Useful Life | 2 years |
Leasehold Improvements [Member] | Maximum [Member] |  |
Property, Plant and Equipment, Useful Life | 5 years |

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