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Stock-based Compensation
 3 Months Ended
Mar. 31, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Disclosure of Compensation Related Costs, Share-based Payments [Text Block]
Note 3.          Stock-based Compensation
 
On June 2, 2010, the Company’s shareholders approved an amendment and restatement of the 2006 Stock Incentive Plan (the “2006 Plan”). Among other things, the amendment and restatement renamed the 2006 Plan as the Incentive Compensation Plan (the “Plan”) and increased the number of shares of the Company’s common stock reserved for issuance under the Plan by an additional 880,000 shares from 750,000 shares to 1,630,000 shares. The shares are reserved for issuance to officers of the Company, other key employees, non-employee directors, and advisors. The Plan serves as successor to the Company’s previous two stock-based employee compensation plans, the 1995 and 2001 Stock Option Plans. The shares reserved under those two plans, including the shares of common stock subject to currently outstanding options under the plans, were transferred to the Plan, and no further grants or share issuances will be made under the 1995 and 2001 Plans. Under the Plan, there have been 176,000 restricted stock units granted, consisting primarily of annual automatic grants and deferred compensation to non-employee directors, and there are 655,000 options granted, of which 121,000 options are vested as of March 31, 2015.
 
Stock-based compensation expense associated with the Company’s stock-based awards to employees is calculated using the Black-Scholes valuation model. The Company’s stock-based awards have characteristics significantly different from those of traded options, and changes in the subjective input assumptions can materially affect the fair value estimates. The estimated fair value of the Company’s option grants is estimated using assumptions for expected life, volatility, dividend yield, and risk-free interest rate which are specific to each award. The estimated fair value of the Company’s options is amortized over the period during which an employee is required to provide service in exchange for the award (requisite service period), usually the vesting period. Accordingly, stock-based compensation cost before income tax effect in the amount of $36,000 is reflected in net income for the three month period ended March 31, 2015, compared to $26,000 in the same period in the prior year. There were no options issued and no options exercised during either of the three month periods ended March 31, 2015 or March 31, 2014. There were no excess income tax benefits to report.