Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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Aggregate number of common shares reserved for future issuance.

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Face amount or stated value per share of common stock.

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Unrecognized cost of unvested share-based compensation awards.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of share options (or share units) exercised during the current period.

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Note 11 - Stockholders' Equity (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 12, 2007	Nov. 30, 2006	Jun. 15, 1989
Common Stock, Par or Stated Value Per Share	$ 0.01	$ 0.01
Allocated Share-based Compensation Expense	$ 776,000	$ 751,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	284,730
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	100,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value	$ 203,000
Selling, General and Administrative Expenses [Member]
Allocated Share-based Compensation Expense	776,000	$ 751,000
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	276,000	170,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized		$ 44,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition		127 days
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value	421,000	$ 288,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized	$ 1,194,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition	1 year 65 days
The 1989 Non-qualified Stock Option Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance						700,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	0	35,250	35,250
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	35,250	0
The 1989 Non-qualified Stock Option Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	5 years
The 1989 Non-qualified Stock Option Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	7 years
The 2001 Non-qualified Stock Option Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance					300,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	4 years
Common Stock, Par or Stated Value Per Share					$ 0.01
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	0	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	59,730	124,480	124,480
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	64,750	0
The 2007 Share Incentive Plan [Member]
Common Stock, Capital Shares Reserved for Future Issuance				750,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	125,000	0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number	225,000	100,000	100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period	0	0
The 2007 Share Incentive Plan [Member] \| Directors and Key Employees [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	42,320	36,108
The 2007 Share Incentive Plan [Member] \| Key Employee [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	100,000
The 2007 Share Incentive Plan [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	7 years
The 2007 Share Incentive Plan [Member] \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period	10 years