Note 7 - Capital Stock - Restricted Stock Units Activity (Details) - Restricted Stock Units (RSUs) [Member] - $ / shares |
3 Months Ended | 12 Months Ended |
|---|---|---|
Mar. 31, 2019 |
Dec. 30, 2018 |
|
| Balance, outstanding options (in shares) | 357,377 | |
| Balance, outstanding weighted average stock price (in dollars per share) | $ 0.96 | |
| Balance, outstanding weighted average remaining contractual term (Year) | 1 year 54 days | 1 year 76 days |
| RSU granted (in shares) | 0 | |
| RSU granted (in dollars per share) | ||
| RSU vested and issued in common shares (in shares) | (164,177) | |
| RSU vested and issued in common shares (in dollars per share) | $ (0.32) | |
| RSU forfeited (in shares) | ||
| RSU forfeited (in dollars per share) | ||
| Balance, outstanding options (in shares) | 193,200 | 357,377 |
| Balance, outstanding weighted average stock price (in dollars per share) | $ 1.51 | $ 0.96 |
| X | ||||||||||
- Definition Weighted average per share amount of restricted stock units converted into common stock. No definition available.
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| X | ||||||||||
- Definition Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Per share or unit weighted-average fair value of nonvested award under share-based payment arrangement. Excludes share and unit options. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of shares under non-option equity instrument agreements that were cancelled as a result of occurrence of a terminating event. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Definition Number of shares issued during the period as a result of the conversion of convertible securities. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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| X | ||||||||||
- Details
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