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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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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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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

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Maximum number of shares that may be issued in accordance with the plan as a proportion of outstanding capital stock.

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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 - Stock Options (Details Textual) - USD ($)				3 Months Ended		6 Months Ended
Note 11 - Stock Options (Details Textual) - USD ($)	Jul. 18, 2016	Jan. 02, 2016	Jul. 27, 2010	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Dec. 31, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	10,391,711
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number				5,849,433		5,849,433		4,211,168
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period						0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross						2,171,600	1,565,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value						$ 0.18	$ 0.33
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period						533,335
Allocated Share-based Compensation Expense				$ 311,000	$ 167,000	$ 446,000	$ 318,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized				$ 492,000		$ 492,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition						1 year 317 days
Option Plan 2010 Member
Share-based Compensation Arrangement by Share-based Payment Award, Percentage of Outstanding Stock Maximum			15.00%
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period		5 years
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant		5,719,069		0		0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number		38,127,129			2,251,168		2,251,168
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period	875,000
Option Plan 2010 Member \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		1 year
Option Plan 2010 Member \| Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period		3 years
The 2016 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant	2,391,711
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized	8,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number					1,960,000		1,960,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross	875,000