Note 6 - Shareholders' Equity (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]

	Three Months Ended September 30,						Nine Months Ended September 30,
	2023			2022			2023			2022
Dividend yield		0	%		0	%		0	%		0	%
Expected life (years)		6.2			4.9			6.2			4.9
Expected volatility		93	%		110	%		93	%		110	%
Risk-free interest rate		3.8	%		3.3	%		3.8	%		2.7	%

Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Cost of revenue — Edge to Cloud	$	1	$	4	$	5	$	13
Selling, general and administrative		152		178		226		279
Research and development		1		2		2		6
Total stock-based compensation expense	$	154	$	184	$	233	$	298

Share-Based Payment Arrangement, Option, Activity [Table Text Block]

						Weighted
						Average
				Weighted		Remaining
				Average		Contractual		Aggregate
	Number of			Exercise		Life		Intrinsic
	Shares			Price		(in years)		Value
Balance at December 31, 2022		1,539,278		$	2.05		5.17	$	43,783
Granted		5,000			1.17
Exercised		(26,198	)		1.02
Forfeited		(46,890	)		1.35
Expired		(287,218	)		2.15
Balance at September 30, 2023		1,183,972			2.08		5.67		41,866
Vested and expected to vest at September 30, 2023		1,183,972			2.08		5.67		41,866
Exercisable at September 30, 2023		1,025,464			2.16		5.38		36,283

Schedule of Share Based Compensation Additional Stock Options Activity [Table Text Block]

	Three Months Ended September 30,				Nine Months Ended September 30,
	2023		2022		2023		2022
Weighted average grant-date fair value of options granted during the period		n/a	$	1.40	$	0.90	$	1.66
Options in-the-money (in shares)		237,147		222,373		237,147		222,373
Aggregate intrinsic value of options exercised during the period		311	$	1.02	$	4,008	$	1.16

Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]

	Number of			Weighted Average
	Shares			Award Price
Unvested at December 31, 2022		45,109		$	3.25
Granted		84,612			3.25
Vested		(58,570	)		3.25
Forfeited		(7,692	)		3.25
Unvested at September 30, 2023		63,459			3.25
Expected to vest after September 30, 2023		63,459			3.25

Schedule of Common Stock Reserved For Future Issuance [Table Text Block]

	September 30, 2023
Stock options outstanding		1,183,972
Restricted stock units and performance stock units outstanding		313,459
Stock options and restricted stock units available for future grant		836,131
Common stock reserved for future issuance		2,333,562