Note 6 - Stockholders' Equity (Details) - Assumptions Used to Estimate Fair Value of Warrants (Warrant [Member])	6 Months Ended	12 Months Ended
Sep. 26, 2014	Mar. 31, 2014
Fair Value, Option, Quantitative Disclosures [Line Items]
Expected dividend	0.00%
Partners For Growth [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Contractual term in years	3 years 146 days	3 years 328 days
Volatility	66.70%	65.60%
Expected dividend	0.00%	0.00%
Risk-free interest rate	1.02%	1.25%
2010 Warrants [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Contractual term in years	1 year 73 days	1 year 255 days
Volatility	54.70%	69.50%
Expected dividend	0.00%	0.00%
Risk-free interest rate	0.19%	0.34%

Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)

-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Measure of dispersion, in percentage terms (for instance, the standard deviation or variance), for a given stock price.

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Risk-free interest rate assumption used in valuing an instrument.

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