XML 45 R28.htm IDEA: XBRL DOCUMENT
v3.20.4

Stock Options (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2020
Share-based Payment Arrangement [Abstract] |
Schedule of information about stock options |
|  | Number of options |  |  | Weighted average exercise price |  |  | Weighted average contractual term (years) |  |  | Aggregate intrinsic value |
Outstanding at January 1, 2020 |  |  | 2,004,318 |  |  | $ | 1.72 |  |  |  |  |  |  | $ | 2,542,361 |
Granted |  |  | 860,465 |  |  |  | 2.38 |  |  |  |  |  |  |  |  |
Exercised |  |  | (7,166 | ) |  |  | 0.79 |  |  |  |  |  |  |  | 6,523 |
Forfeited |  |  | (261,917 | ) |  |  | 1.90 |  |  |  |  |  |  |  | 134,070 |
Outstanding at December 31, 2020 |  |  | 2,595,700 |  |  | $ | 1.92 |  |  |  | 7.60 |  |  |  | 2,491,026 |
Vested and exercisable at December 31, 2020 |  |  | 1,730,198 |  |  |  | 1.90 |  |  |  | 7.82 |  |  |  | 1.967,071 |
Outstanding at January 1, 2019 |  |  | 620,900 |  |  | $ | 3.75 |  |  |  |  |  |  |  |  |
Granted |  |  | 1,694,851 |  |  |  | 1.00 |  |  |  |  |  |  |  |  |
Forfeited |  |  | (203,766 | ) |  |  | 1.71 |  |  |  |  |  |  |  | 104,868 |
Expired |  |  | (25,000 | ) |  |  | 6.20 |  |  |  |  |  |  |  |  |
Exercised |  |  | (82,667 | ) |  |  | 0.84 |  |  |  |  |  |  |  | 67,911 |
Outstanding at December 31, 2019 |  |  | 2,004,318 |  |  | $ | 1.72 |  |  |  |  |  |  |  | 2,542,361 |
Schedule of option input into a Black Scholes option pricing model |
|  | 2020 |  |  | 2019 |
Exercise price |  |  | 1.47 |  |  |  | $0.83 to $1.80 |
Expected life |  |  | 5.3 years |  |  |  | 6.8 years |
Expected volatility |  |  | 76.0 | % |  |  | 64 | %
Dividend yield |  |  | 0 | % |  |  | 0 | %
Risk-free interest rate |  |  | 0.28% to 1.72% |  |  |  | 1.43% to 2.55% |

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- 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=120381028&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=120381028&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=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of employee stock purchase plans, including, but not limited to: (a) expected term, (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=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ScheduleOfShareBasedPaymentAwardEmployeeStockPurchasePlanValuationAssumptionsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration