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Note 2 - Impact of ASC 606 Adoption	6 Months Ended
Note 2 - Impact of ASC 606 Adoption	Jun. 30, 2018
Notes to Financial Statements
New Accounting Pronouncements and Changes in Accounting Principles [Text Block]	2. Impact of ASC 606 Adoption On January 1, 2018, the Company adopted ASU No. 2014 - 09, “ Revenue from Contracts with Customers ” (“ASU 2014 - 09” ) using the modified retrospective method of transition. Under this method of transition, the Company applied ASU 2014 - 09 to all new contracts entered into on and after January 1, 2018 and all existing contracts for which all (or substantially all) of the revenue attributable to a contract had not been recognized under legacy revenue guidance. ASU 2014 - 09 supersedes nearly all existing revenue recognition guidance under U.S. GAAP and includes a five step process to recognize revenue when promised goods or services are transferred to customers in an amount that reflects the consideration to which an entity expects to be entitled for those goods or services. For the six months ended June 30, 2018, there was no impact to the Company's reported revenues, operating costs and expenses or net income as a result of adopting ASU 2014 - 09, as compared to legacy revenue guidance. In addition, no cumulative catch-up adjustment to accumulated deficit was required on January 1, 2018 as a result of adopting ASU 2014 - 09.