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Significant Accounting Policies (Policies)	3 Months Ended
	Mar. 31, 2017
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Basis of Presentation These condensed Consolidated Financial Statements contain unaudited information as of March   31, 2017 and for the three months ended March   31, 2017 and 2016. The unaudited interim financial statements have been prepared pursuant to the rules and regulations for reporting on Form 10 -Q. Accordingly, certain disclosures required by accounting principles generally accepted in the United States of America for annual financial statements are not included herein. In management’s opinion, these unaudited financial statements reflect all adjustments (which include only normal recurring adjustments) necessary for a fair presentation of the information when read in conjunction with our 2016 audited Consolidated Financial Statements and the related notes thereto. The financial information as of December   31, 2016 is derived from our Annual Report on Form 10 -K filed with the Securities and Exchange Commission on February   28, 2017. The interim condensed Consolidated Financial Statements should be read in conjunction with the Consolidated Financial Statements and the notes thereto included in our 2016 Annual Report on Form 10 -K. The results of operations for the interim periods presented are not necessarily indicative of the results to be expected for the full year.
Reclassification, Policy [Policy Text Block]	Reclassifications Certain reclassifications of amounts previously reported have been made to the accompanying condensed Consolidated Financial Statements to maintain consistency and comparability between periods presented. This reclassification was related to our adoption of ASU 2016 - 09, "Compensation - Stock Compensation - Improvements to Employee Share-Based Payment Accounting." Specifically, we reclassified the presentation of excess tax benefits on our Consolidated Statements of Cash Flows and recorded reclassifications between additional paid-in capital and retained earnings. See also Note 11.
New Accounting Pronouncements, Policy [Policy Text Block]	In May 2014, the Financial Accounting Standards Board ("FASB") issued accounting standards update ("ASU") 2014 - 09, "Revenue from Contracts with Customers," which amends the accounting guidance related to revenues. This amendment will replace most of the existing revenue recognition guidance when it becomes effective. The new standard, as amended in July 2015, is effective for fiscal years beginning after December 15, 2017 and entities are allowed to adopt the standard as early as annual periods beginning after December 15, 2016, and interim periods therein. The standard permits the use of either the retrospective or cumulative effect transition method. We have evaluated the effect this amendment has on our most significant types of transactions and expect the timing of our revenue recognition to generally remain the same. We plan to apply a cumulative effect transition method at adoption. In February 2016, the FASB issued ASU 2016 - 02, "Leases." ASU 2016 - 02 increases transparency and comparability among organizations by recognizing lease assets and lease liabilities on the balance sheet and requires disclosing key information about leasing arrangements. ASU 2016 - 02 is effective for annual periods beginning after December 15, 2018, and interim periods within those annual periods. We are evaluating the effect this pronouncement will have on our consolidated financial statements and related disclosures. In March 2016, the FASB issued ASU 2016 - 09, "Compensation - Stock Compensation - Improvements to Employee Share-Based Payment Accounting." ASU 2016 - 09 simplifies the accounting for several aspects of share-based payment transactions, including the income tax consequences, classification of awards as either equity or liabilities and classification on the statement of cash flows. In January 2017, we adopted this new guidance. As a result of this adoption, we recorded the following cumulative effects: • Reclassified $168,192 as a decrease to additional paid-in capital and an increase to retained earnings related to our policy election to record forfeitures as they occur. • All prior periods presented in our Consolidated Statements of Cash Flow have been adjusted for the presentation of excess tax benefits on the cash flow statement. In August 2016, the FASB issued ASU 2016 - 15, "Classification of Certain Cash Receipts and Cash Payments." ASU 2016 - 15 provides guidance for eight cash flow classification issues to reduce diversity in practice. The clarification includes guidance on items such as debt prepayment or debt extinguishment cost, contingent consideration payment made after a business combination, proceeds from the settlement of insurance claims, proceeds from the settlement of corporate-owned life insurance policies and distributions received from equity method investees. ASU 2016 - 15 is effective for annual periods beginning after December 15, 2017, and interim periods within those annual periods. Early adoption is permitted. We are evaluating the effect this pronouncement will have on our consolidated financial statements and related disclosures. In January 2017, the FASB issued ASU 2017 - 04, "Intangibles - Goodwill and Other (Topic 350) - Simplifying the Test for Goodwill Impairment." ASU 2017 - 04 simplifies the subsequent measurement of goodwill by eliminating Step 2 from the goodwill impairment test. An entity should perform its annual, or interim, goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount, and recognize an impairment charge for the amount by which the carrying amount exceeds the reporting unit's fair value, if applicable. The loss recognized should not exceed the total amount of goodwill allocated to the reporting unit. The same impairment test also applies to any reporting unit with a zero or negative carrying amount. An entity still has the option to perform the qualitative assessment for a reporting unit to determine if the quantitative impairment test is necessary. ASU 2017 - 04 is effective for fiscal years, including interim periods within those fiscal years, beginning after December 15, 2019, on a prospective basis. Early adoption is permitted for interim or annual goodwill impairment tests performed after January 1, 2017. We do not expect the adoption of ASU 2017 - 04 to have a material effect on our financial position, results of operations or cash flows.

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- Definition

Disclosure of accounting policy for basis of accounting, or basis of presentation, used to prepare the financial statements (for example, US Generally Accepted Accounting Principles, Other Comprehensive Basis of Accounting, IFRS).

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Disclosure of accounting policy pertaining to new accounting pronouncements that may impact the entity's financial reporting. Includes, but is not limited to, quantification of the expected or actual impact.

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Disclosure of accounting policy for reclassifications that affects the comparability of the financial statements.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6359566&loc=d3e326-107755

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