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Note L - Stock Option Plans (Tables) | 12 Months Ended
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Dec. 31, 2018
Notes Tables |
Share-based Compensation, Stock Options, Activity [Table Text Block] |
|  | Number of Options |  |  | Weighted Averaged Exercise Price $ |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Options Value $ |
Options outstanding December 31, 2016 |  |  | 1,511,995 |  |  |  | 1.74 |  |  |  | 2.97 |  |  |  | 102,605 |
Granted |  |  | 1,806,741 |  |  |  | 1.82 |  |  |  | 4.69 |  |  |  | 25,610 |
Exercised during 2017 |  |  | (83,333 | ) |  |  | 0.75 |  |  |  | - |  |  |  | - |
Forfeited or expired |  |  | (1,250,068 | ) |  |  | - |  |  |  | - |  |  |  | - |
Options outstanding December 31, 2017 |  |  | 1,985,335 |  |  |  | 1.74 |  |  |  | 3.04 |  |  |  | 25,160 |
Exercisable, December 31, 2017 |  |  | 1,317,441 |  |  |  | 1.84 |  |  |  | 2.46 |  |  |  | 8,537 |
Granted |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Exercised during 2018 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Forfeited or expired |  |  | (315,114 | ) |  |  | 1.50 |  |  |  | - |  |  |  | - |
Options outstanding December 31, 2018 |  |  | 1,670,221 |  |  |  | 1.71 |  |  |  | 2.40 |  |  |  | - |
Exercisable, December 31, 2018 |  |  | 1,317,632 |  |  |  | 1.79 |  |  |  | 2.15 |  |  |  | - |
|  | Number of Options |  |  | Weighted Averaged Exercise Price $ |  |  | Weighted Average Remaining Contractual Life (Years) |  |  | Aggregate Intrinsic Options Value $ |
Options outstanding December 31, 2016 |  |  | 224,999 |  |  |  | 2.53 |  |  |  | 5.32 |  |  |  | - |
Granted |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Exercised during 2017 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Forfeited or expired |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Options outstanding December 31, 2017 |  |  | 224,999 |  |  |  | 2.53 |  |  |  | 4.32 |  |  |  | - |
Exercisable, December 31, 2017 |  |  | 23,067 |  |  |  | 2.22 |  |  |  | 4.38 |  |  |  | - |
Granted |  |  | 8,333 |  |  |  | 0.75 |  |  |  | 4.33 |  |  |  |  |
Exercised during 2018 |  |  | - |  |  |  | - |  |  |  | - |  |  |  | - |
Forfeited or expired |  |  | (200,000 | ) |  |  | 2.55 |  |  |  | - |  |  |  | - |
Options outstanding December 31, 2018 |  |  | 33,332 |  |  |  | 1.87 |  |  |  | 2.94 |  |  |  | - |
Exercisable, December 31, 2018 |  |  | 27,777 |  |  |  | 2.10 |  |  |  | 2.66 |  |  |  | - |
Schedule of Share-based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] |
|  | 2018 |  |  | 2017 |
Volatility |  |  | - |  |  |  | 81.23%-97.24% |
Risk-free interest |  |  | - |  |  |  | 1.4%-2.2% |
Expected Life |  | - |  |  | 2-5 years |
Dividend yield |  |  | - |  |  |  | 0 | %
Forfeiture Rate |  |  | - |  |  |  | 6 | %

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- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + 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 (d) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 Reference 3: 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) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + 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 (f)(2) -URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901 + Details
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