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Note P - Options Outstanding and Exercisable (Details) | 12 Months Ended
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Dec. 31, 2015 $ / shares shares
Exercise Price Range 1 [Member] |
Range of exercise prices, lower range (in dollars per share) | $ 0.15
Range of exercise prices, upper range (in dollars per share) | $ 0.40
Options outstanding (in shares) | shares | 2,893,000
Options outstanding, weighted average exercise price (in dollars per share) | $ 0.24
Options outstanding, weighted average remaining life | 4 years 248 days
Options exercisable (in shares) | shares | 1,244,167
Options exercisable, weighted average exercise price (in dollars per share) | $ 0.28
Exercise Price Range 2 [Member] |
Range of exercise prices, lower range (in dollars per share) | 0.41
Range of exercise prices, upper range (in dollars per share) | $ 0.79
Options outstanding (in shares) | shares | 1,280,833
Options outstanding, weighted average exercise price (in dollars per share) | $ 0.41
Options outstanding, weighted average remaining life | 5 years 65 days
Options exercisable (in shares) | shares | 482,486
Options exercisable, weighted average exercise price (in dollars per share) | $ 0.41
Exercise Price Range 3 [Member] |
Range of exercise prices, lower range (in dollars per share) | 0.80
Range of exercise prices, upper range (in dollars per share) | $ 0.92
Options outstanding (in shares) | shares | 205,000
Options outstanding, weighted average exercise price (in dollars per share) | $ 0.90
Options outstanding, weighted average remaining life | 1 year 7 days
Options exercisable (in shares) | shares | 205,000
Options exercisable, weighted average exercise price (in dollars per share) | $ 0.90
Exercise Price Range 4 [Member] |
Range of exercise prices, lower range (in dollars per share) | 0.15
Range of exercise prices, upper range (in dollars per share) | $ 0.92
Options outstanding (in shares) | shares | 4,378,833
Options exercisable (in shares) | shares | 1,931,653
Options exercisable, weighted average exercise price (in dollars per share) | $ 0.38

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- 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6415400&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&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://www.xbrl.org/2003/role/presentationRef -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=6415400&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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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=6415400&loc=d3e5070-113901 + Details
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- Definition Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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