Note 5 - Stock Option Activity (Details) - $ / shares |
3 Months Ended | 12 Months Ended |
|---|---|---|
Apr. 03, 2016 |
Jan. 03, 2016 |
|
| Balance, options outstanding (in shares) | 655,114 | |
| Balance, outstanding weighted average exercise price (in dollars per share) | $ 1.98 | |
| Balance, outstanding weighted average remaining contractual term | 6 years 354 days | 6 years 182 days |
| Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross | 155,403 | |
| Share-based Compensation Arrangements by Share-based Payment Award, Options, Grants in Period, Weighted Average Exercise Price | $ 1.34 | |
| Forfeited (in shares) | (18,603) | |
| Forfeited (in dollars per share) | $ 3.14 | |
| Balance, options outstanding (in shares) | 791,914 | 655,114 |
| Balance, outstanding weighted average exercise price (in dollars per share) | $ 1.85 | $ 1.98 |
| Exercisable at April 3, 2016 (in shares) | 394,098 | |
| Exercisable at April 3, 2016 (in dollars per share) | $ 2.07 | |
| Balance, exercisable weighted average remaining contractual term | 5 years 116 days |
| X | ||||||||||
- Definition The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Gross number of share options (or share units) granted during the period. No definition available.
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| X | ||||||||||
- Definition Number of options outstanding, including both vested and non-vested options. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated. No definition available.
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| X | ||||||||||
- Definition Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options. No definition available.
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| X | ||||||||||
- Definition 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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
- Definition Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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