Note 7 - Sale of Common Stock (Details Textual) - USD ($) $ / shares in Units, $ in Thousands |
9 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|
Nov. 08, 2019 |
Mar. 28, 2018 |
Dec. 28, 2019 |
Dec. 29, 2018 |
Mar. 30, 2019 |
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| Stock Issued During Period, Shares, New Issues | 10,490,000 | ||||
| Shares Issued, Price Per Share | $ 0.25 | ||||
| Proceeds from Issuance of Common Stock | $ 2,100 | $ 2,053 | |||
| Series E Preferred Stock [Member] | |||||
| Stock Issued During Period, Shares, New Issues | 42,800 | 0 | 57,200 | ||
| Shares Issued, Price Per Share | $ 25 | $ 25 | |||
| Preferred Stock, Shares Outstanding, Ending Balance | 9,200 | 98,400 | |||
| Conversion of Series E Preferred Stock into Common Stock [Member] | |||||
| Conversion of Stock, Shares Issued | 896,636 | ||||
| Conversion of Stock, Shares Converted | 88,600 | ||||
| Underwriter Warrants [Member] | |||||
| Class of Warrant or Right, Number of Securities Called by Warrants or Rights | 314,700 | ||||
| Class of Warrant or Right, Exercise Price of Warrants or Rights | $ 0.30 | ||||
| Warrants and Rights Outstanding, Term | 5 years | ||||
| X | ||||||||||
- Definition Exercise price per share or per unit of warrants or rights outstanding. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Number of securities into which the class of warrant or right may be converted. For example, but not limited to, 500,000 warrants may be converted into 1,000,000 shares. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of shares converted in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The number of new shares issued in the conversion of stock in a noncash (or part noncash) transaction. Noncash is defined as transactions during a period that do not result in cash receipts or cash payments in the period. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition The cash inflow from the additional capital contribution to the entity. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Per share or per unit amount of equity securities issued. No definition available.
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- Definition Number of new stock issued during the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Period between issuance and expiration of outstanding warrant and right embodying unconditional obligation requiring redemption by transferring asset at specified or determinable date or upon event certain to occur, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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