Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Number of shares authorized for issuance under share-based payment arrangement.

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

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Number of shares issued under share-based payment arrangement.

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Note 3 - Stock-based Compensation Plans (Details Textual) - USD ($)	1 Months Ended	6 Months Ended
	Jul. 31, 2019	Jun. 30, 2020	Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance (in shares)		115,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross (in shares)		0
Share-based Payment Arrangement, Expense		$ 1,551,000	$ 245,000
Two Thousand Fourteen Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)			675,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)			674,987
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period (in shares)	13
Two Thousand Fourteen Equity Incentive Plan [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)			15,312
Two Thousand Nineteen Equity Incentive Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized (in shares)		1,200,000
Two Thousand Nineteen Equity Incentive Plan [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)		19,279
Two Thousand Nineteen Equity Incentive Plan [Member] \| Directors, Employees and Consultants [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period (in shares)		262,129