Note 10 - Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

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

	Year Ended December 31,
	2022			2021
Dividend yield		0	%		0	%
Expected life (in years)		5.9			4.9
Expected volatility		96	%		111	%
Risk-free interest rate		2.9	%		1.0	%

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

	Year Ended December 31,
	2022		2021
Cost of revenue — Edge to Cloud	$	12	$	35
Selling, general and administrative		401		625
Research and development		7		14
Total stock-based compensation expense	$	420	$	674
Per basic and diluted share	$	0.02	$	0.04

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

						Weighted Average
						Remaining
				Weighted Average		Contractual Life		Aggregate
	Number of Shares			Exercise Price		(in years)		Intrinsic Value
Balance at December 31, 2020		1,786,891		$	3.10		7.75	$	330,831
Granted		195,000			2.76
Exercised		(36,130	)		1.88
Forfeited		(180,592	)		1.95
Expired		(101,155	)		3.24
Balance at December 31, 2021		1,664,014			2.07		6.64	$	405,223
Granted		112,000			1.57
Exercised		(69,631	)		1.16
Forfeited		(97,867	)		1.53
Expired		(69,238	)		3.21
Balance at December 31, 2022		1,539,278			2.05		5.17	$	43,783
Vested and expected to vest at December 31, 2022		1,539,278			2.05		5.17		43,783
Exercisable at December 31, 2022		1,169,731		$	2.22		4.53	$	31,617

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

	Year Ended December 31,
	2022		2021
Weighted average grant-date fair value for options granted during the year	$	1.21	$	2.86
Vested options in-the-money		237,720		327,476
Aggregate intrinsic value of options exercised during the year	$	2,057	$	1.88

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

	Number of			Weighted Average
	Shares			Award Price
Unvested at December 31, 2020		164,697		$	1.48
Granted		90,343			2.72
Vested		(199,311	)		1.83
Forfeited		(21,115	)		1.48
Unvested at December 31, 2021		34,614			2.72
Granted		83,221			3.25
Vested		(72,726	)		3.00
Forfeited		—			—
Unvested at December 31, 2022		45,109			3.25
Expected to vest after December 31, 2022		45,109		$	3.25

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

Stock options outstanding	1,539,278
Restricted stock units and performance stock units outstanding	461,776
Stock options available for future grant	905,551
Common stock reserved for future issuance	2,906,605

Class of Treasury Stock [Table Text Block]

	Year Ended December 31,
	2022		2021
Shares repurchased		178,857		—
Total cost of shares repurchased	$	202,947	$	—