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