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Note 13 - Capital Stock - Outstanding and Exercisable Options (Details) $ / shares in Units, $ in Thousands | 12 Months Ended
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Dec. 31, 2019 USD ($) $ / shares shares
Range of Exercise Price, Lower Limit (in dollars per share) | $ 1.78
Range of Exercise Price, Upper Limit (in dollars per share) | $ 5.78
Options Outstanding, Shares Outstanding (in shares) | shares | 2,266,122
Options Outstanding, Weighted Average Remaining Contractual Life (Year) | 5 years 346 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 3.93
Options Outstanding, Aggregate Intrinsic Value | $ | $ 257
Options Exercisable, Shares Exercisable (in shares) | shares | 1,649,299
Options Exercisable. Weighted Average Remaining Contractual Life (Year) | 4 years 255 days
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 4.28
Options Exercisable, Aggregate Intrinsic Value | $ | $ 50
Exercise Price Range 1 [Member] |
Range of Exercise Price, Lower Limit (in dollars per share) | $ 1.78
Range of Exercise Price, Upper Limit (in dollars per share) | $ 2.59
Options Outstanding, Shares Outstanding (in shares) | shares | 234,399
Options Outstanding, Weighted Average Remaining Contractual Life (Year) | 6 years 175 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 2.14
Options Outstanding, Aggregate Intrinsic Value | $ | $ 213
Options Exercisable, Shares Exercisable (in shares) | shares | 94,069
Options Exercisable. Weighted Average Remaining Contractual Life (Year) | 1 year 343 days
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 2.57
Options Exercisable, Aggregate Intrinsic Value | $ | $ 45
Exercise Price Range 2 [Member] |
Range of Exercise Price, Lower Limit (in dollars per share) | $ 2.60
Range of Exercise Price, Upper Limit (in dollars per share) | $ 2.94
Options Outstanding, Shares Outstanding (in shares) | shares | 208,414
Options Outstanding, Weighted Average Remaining Contractual Life (Year) | 9 years 189 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 2.84
Options Outstanding, Aggregate Intrinsic Value | $ | $ 44
Options Exercisable, Shares Exercisable (in shares) | shares | 10,000
Options Exercisable. Weighted Average Remaining Contractual Life (Year) | 7 years 91 days
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 2.60
Options Exercisable, Aggregate Intrinsic Value | $ | $ 5
Exercise Price Range 3 [Member] |
Range of Exercise Price, Lower Limit (in dollars per share) | $ 2.95
Range of Exercise Price, Upper Limit (in dollars per share) | $ 3.49
Options Outstanding, Shares Outstanding (in shares) | shares | 264,571
Options Outstanding, Weighted Average Remaining Contractual Life (Year) | 8 years
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 3.23
Options Outstanding, Aggregate Intrinsic Value | $ |
Options Exercisable, Shares Exercisable (in shares) | shares | 148,400
Options Exercisable. Weighted Average Remaining Contractual Life (Year) | 7 years 164 days
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 3.27
Options Exercisable, Aggregate Intrinsic Value | $ |
Exercise Price Range 4 [Member] |
Range of Exercise Price, Lower Limit (in dollars per share) | $ 3.50
Range of Exercise Price, Upper Limit (in dollars per share) | $ 3.92
Options Outstanding, Shares Outstanding (in shares) | shares | 305,839
Options Outstanding, Weighted Average Remaining Contractual Life (Year) | 7 years 116 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 3.74
Options Outstanding, Aggregate Intrinsic Value | $ |
Options Exercisable, Shares Exercisable (in shares) | shares | 166,431
Options Exercisable. Weighted Average Remaining Contractual Life (Year) | 5 years 277 days
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 3.70
Options Exercisable, Aggregate Intrinsic Value | $ |
Exercise Price Range 5 [Member] |
Range of Exercise Price, Lower Limit (in dollars per share) | $ 3.93
Range of Exercise Price, Upper Limit (in dollars per share) | $ 4.08
Options Outstanding, Shares Outstanding (in shares) | shares | 65,849
Options Outstanding, Weighted Average Remaining Contractual Life (Year) | 1 year 153 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 4.04
Options Outstanding, Aggregate Intrinsic Value | $ |
Options Exercisable, Shares Exercisable (in shares) | shares | 65,849
Options Exercisable. Weighted Average Remaining Contractual Life (Year) | 1 year 153 days
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 4.04
Options Exercisable, Aggregate Intrinsic Value | $ |
Exercise Price Range 6 [Member] |
Range of Exercise Price, Lower Limit (in dollars per share) | $ 4.09
Range of Exercise Price, Upper Limit (in dollars per share) | $ 4.17
Options Outstanding, Shares Outstanding (in shares) | shares | 355,625
Options Outstanding, Weighted Average Remaining Contractual Life (Year) | 4 years 149 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 4.12
Options Outstanding, Aggregate Intrinsic Value | $ |
Options Exercisable, Shares Exercisable (in shares) | shares | 355,625
Options Exercisable. Weighted Average Remaining Contractual Life (Year) | 4 years 149 days
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 4.12
Options Exercisable, Aggregate Intrinsic Value | $ |
Exercise Price Range 7 [Member] |
Range of Exercise Price, Lower Limit (in dollars per share) | $ 4.18
Range of Exercise Price, Upper Limit (in dollars per share) | $ 4.38
Options Outstanding, Shares Outstanding (in shares) | shares | 370,000
Options Outstanding, Weighted Average Remaining Contractual Life (Year) | 3 years 339 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 4.30
Options Outstanding, Aggregate Intrinsic Value | $ |
Options Exercisable, Shares Exercisable (in shares) | shares | 370,000
Options Exercisable. Weighted Average Remaining Contractual Life (Year) | 3 years 339 days
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 4.30
Options Exercisable, Aggregate Intrinsic Value | $ |
Exercise Price Range 8 [Member] |
Range of Exercise Price, Lower Limit (in dollars per share) | $ 4.39
Range of Exercise Price, Upper Limit (in dollars per share) | $ 5.39
Options Outstanding, Shares Outstanding (in shares) | shares | 141,550
Options Outstanding, Weighted Average Remaining Contractual Life (Year) | 5 years 204 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 4.99
Options Outstanding, Aggregate Intrinsic Value | $ |
Options Exercisable, Shares Exercisable (in shares) | shares | 126,550
Options Exercisable. Weighted Average Remaining Contractual Life (Year) | 5 years 80 days
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 5.04
Options Exercisable, Aggregate Intrinsic Value | $ |
Exercise Price Range 9 [Member] |
Range of Exercise Price, Lower Limit (in dollars per share) | $ 5.40
Range of Exercise Price, Upper Limit (in dollars per share) | $ 5.54
Options Outstanding, Shares Outstanding (in shares) | shares | 174,875
Options Outstanding, Weighted Average Remaining Contractual Life (Year) | 5 years 65 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 5.51
Options Outstanding, Aggregate Intrinsic Value | $ |
Options Exercisable, Shares Exercisable (in shares) | shares | 174,875
Options Exercisable. Weighted Average Remaining Contractual Life (Year) | 5 years 65 days
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 5.51
Options Exercisable, Aggregate Intrinsic Value | $ |
Exercise Price Range 10 [Member] |
Range of Exercise Price, Lower Limit (in dollars per share) | $ 5.55
Range of Exercise Price, Upper Limit (in dollars per share) | $ 5.75
Options Outstanding, Shares Outstanding (in shares) | shares | 145,000
Options Outstanding, Weighted Average Remaining Contractual Life (Year) | 5 years 237 days
Options Outstanding, Weighted Average Exercise Price (in dollars per share) | $ 5.58
Options Outstanding, Aggregate Intrinsic Value | $ |
Options Exercisable, Shares Exercisable (in shares) | shares | 137,500
Options Exercisable. Weighted Average Remaining Contractual Life (Year) | 5 years 178 days
Options Exercisable, Weighted Average Exercise Price (in dollars per share) | $ 5.57
Options Exercisable, Aggregate Intrinsic Value | $ |

X
- Definition Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(i)-(ii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(2) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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