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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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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Unrecognized cost of unvested share-based awards, other than options, awarded to employees as compensation.

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Unrecognized cost of unvested options awarded to employees as compensation.

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The cash outflow for cost incurred directly with the issuance of an equity security.

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The cash inflow from the additional capital contribution to the entity.

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Discount rate from fair value on offering date that participants pay for shares.

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

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Price of a single share of a number of saleable stocks of a company.

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Intrinsic value of equity-based compensation awards outstanding. Excludes stock and unit options.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Number of new stock issued during the period.

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Note 6 - Stockholders' Equity (Details Textual) - USD ($)		3 Months Ended		6 Months Ended
	Jun. 26, 2017	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross		0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term				7 years 76 days
Share Price		$ 2.15		$ 2.15
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value		$ 1,200,000	$ 0	$ 1,200,000	$ 0
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options		2,800,000		2,800,000
Allocated Share-based Compensation Expense		620,000	708,000	1,206,000	1,237,000
Proceeds from Issuance of Common Stock				$ 4,911,000
June 2017 Direct Offering [Member]
Share Price	$ 2.50
Stock Issued During Period, Shares, New Issues	2,184,000
Proceeds from Issuance of Common Stock	$ 4,900,000
June 2017 Direct Offering [Member] \| Placement Agency Fees [Member]
Payments of Stock Issuance Costs	300,000
June 2017 Direct Offering [Member] \| Other Offering Expenses [Member]
Payments of Stock Issuance Costs	$ 200,000
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date				85.00%
Allocated Share-based Compensation Expense		20,000	20,000	$ 40,000	$ 50,000
Stock Issued During Period, Shares, New Issues				41,205	46,604
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Aggregate Intrinsic Value, Outstanding		200,000	$ 300,000	$ 200,000	$ 300,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Share-based Awards Other than Options		$ 300,000		$ 300,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition				2 years 156 days
Employee Stock Option [Member]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition				2 years 120 days