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2004 Plan outstanding and exercisable options by price range (Details) - $ / shares | 11 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Dec. 31, 2019
Weighted average remaining life (in yrs.) |  | 5 years 6 months 29 days
Price Range $0.95 - $1.25 |  |
Range of exercise |  | $ 0.95
Range of exercise |  | $ 1.25
Number outstanding options | 340,380 | 340,380
Weighted average remaining life (in yrs.) |  | 3 years 6 months 29 days
Weighted average exercise price (US$ per share) | $ 1.05 | $ 1.05
Number exercisable options | 340,380 | 340,380
Weighted average exercise price | $ 1.05 | $ 1.05
Price Range $1.50 - $1.82 |  |
Range of exercise |  | 1.50
Range of exercise |  | $ 1.82
Number outstanding options | 141,855 | 141,855
Weighted average remaining life (in yrs.) |  | 2 years 29 days
Weighted average exercise price (US$ per share) | $ 1.73 | $ 1.73
Number exercisable options | 141,855 | 141,855
Weighted average exercise price | $ 1.73 | $ 1.73
Price Range $1.89 - $2.27 |  |
Range of exercise | 1.89 |
Range of exercise | $ 2.27 |
Number outstanding options | 513,647 | 513,647
Weighted average remaining life (in yrs.) | 6 years 29 days |
Weighted average exercise price (US$ per share) | $ 2.07 | $ 2.07
Number exercisable options | 369,493 | 369,493
Weighted average exercise price | $ 2.07 | $ 2.07
Price Range $2.32 - $2.49 |  |
Range of exercise |  | 2.32
Range of exercise |  | $ 2.49
Number outstanding options | 474,860 | 474,860
Weighted average remaining life (in yrs.) |  | 6 years
Weighted average exercise price (US$ per share) | $ 2.34 | $ 2.34
Number exercisable options | 135,317 | 135,317
Weighted average exercise price | $ 2.34 | $ 2.34
Price Range $2.50 - $2.75 |  |
Range of exercise |  | 2.50
Range of exercise |  | $ 2.75
Number outstanding options | 318,182 | 318,182
Weighted average remaining life (in yrs.) |  | 6 years 2 months 1 day
Weighted average exercise price (US$ per share) | $ 2.69 | $ 2.69
Number exercisable options | 300,210 | 300,210
Weighted average exercise price | $ 2.69 | $ 2.69
Price Range $2.82 - $2.93 |  |
Range of exercise |  | 2.82
Range of exercise |  | $ 2.93
Number outstanding options | 219,374 | 219,374
Weighted average remaining life (in yrs.) |  | 8 years 2 months 1 day
Weighted average exercise price (US$ per share) | $ 2.93 | $ 2.93
Number exercisable options | 107,459 | 107,459
Weighted average exercise price | $ 2.93 | $ 2.93
Price Range $3.04 - $3.88 |  |
Range of exercise |  | 3.04
Range of exercise |  | $ 3.88
Number outstanding options | 200,880 | 200,880
Weighted average remaining life (in yrs.) |  | 3 years 8 months 2 days
Weighted average exercise price (US$ per share) | $ 3.37 | $ 3.37
Number exercisable options | 194,901 | 194,901
Weighted average exercise price | $ 3.37 | $ 3.37
Price Range $4.22 - $4.49 |  |
Range of exercise |  | 4.22
Range of exercise |  | $ 4.49
Number outstanding options | 183,608 | 183,608
Weighted average remaining life (in yrs.) |  | 7 years 5 months 1 day
Weighted average exercise price (US$ per share) | $ 4.24 | $ 4.24
Number exercisable options | 124,684 | 124,684
Weighted average exercise price | $ 4.24 | $ 4.24
Price Range $0.95 - $4.49 |  |
Range of exercise |  | 0.95
Range of exercise |  | $ 4.49
Number outstanding options | 2,392,786 | 2,392,786
Weighted average remaining life (in yrs.) |  | 5 years 6 months 29 days
Weighted average exercise price (US$ per share) | $ 2.40 | $ 2.40
Number exercisable options | 1,714,299 | 1,714,299
Weighted average exercise price | $ 2.40 | $ 2.40

X
- 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 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. + 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)(1) -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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