Stock Options and Stock Grants (Tables)

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

We follow ASC Topic 718, Share-Based Payments, in which compensation expense is recognized only for share-based payments expected to vest.

We follow ASC Topic 718, Share-Based Payments, in which compensation expense is recognized only for share-based payments expected to vest. 

	Years ended   December 31,
	2022		2021
Share-based compensation expense	$	625	$	160
Remaining unrecognized compensation expense	$	1,732
Remaining weighted average-period, expense recognition (years)		2.5

Schedule of assumptions used to calculate Black-Scholes option pricing model for options granted

The following table illustrates the various assumptions used to calculate the Black-Scholes option pricing model for options granted for all years presented:

	Years Ended December 31,
	2022			2021
Weighted-average risk-free interest rates:		3.5	%		1.4	%
Dividend yield:		0	%		0	%
Weighted-average expected life (years) of the option:		5			5
Weighted-average expected stock price volatility:		116	%		115	%
Weighted-average fair value of the options granted:	$	0.97		$	2.59

Additional disclosures for options granted for all years presented:

Additional disclosures for options granted for all years presented:

	Years Ended December 31,
	2022			2021
Vesting period (years) of shares granted in period		3			3
Contractual life (years) of shares granted in period		7			7
Estimated forfeitures		4	%		4	%

Schedule of option activity

The following table summarizes the option activity for our employees and directors during the year ended December 31, 2022:

						Weighted
				Weighted		Average	Aggregate
				Average		Remaining	Intrinsic
	Shares			Exercise Price		Contractual	Value
Options	(Rounded)			per Share		Term (Years)	(000s)
Outstanding on January 1, 2022		3,193,216		$	1.18
Granted		768,400		$	1.61
Exercised		(414,455	)	$	0.44
Forfeited or expired		(103,500	)	$	2.50
Outstanding on December 31, 2022		3,443,661		$	1.33	4.9	$	1,230
Exercisable on December 31, 2022		2,193,254		$	0.86	4.1	$	1,126
Shares available for grant		1,119,100

The aggregate intrinsic value in the table above is based on our closing stock price of $1.13

The aggregate intrinsic value in the table above is based on our closing stock price of $1.13 on the last business day for the year ended December 31, 2022.

	Years ended  December 31,
	2022		2021
Shares exercised		414,455		535,100
Total intrinsic value	$	942	$	1,169
Cash received	$	182	$	234