Note 11 - Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	Year Ended December 31,
	2021			2020
Dividend yield		0	%		0	%
Expected life (in years)		4.9			4.9
Expected volatility		111	%		64	%
Risk-free interest rate		1.0	%		0.5	%

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

	Year Ended December 31,
	2021		2020
Cost of revenue — Edge to Cloud	$	35	$	79
Selling, general and administrative		625		735
Research and development		14		(2	)
Total stock-based compensation expense	$	674	$	812
Per basic share	$	0.04	$	0.06
Per diluted share	$	0.04	$	0.06

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, 2019		1,544,826		$	2.74		7.47
Granted		683,900			1.08
Exercised		(26,250	)		1.34
Forfeited		(215,218	)		1.50
Expired		(200,367	)		4.82
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
Vested and expected to vest at December 31, 2021		1,664,014			2.07		6.64		405,223
Exercisable at December 31, 2021		993,041		$	2.41		5.76	$	188,009

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

	Year Ended December 31,
	2021		2020
Weighted average grant-date fair value for options granted during the year	$	2.86	$	1.08
Vested options in-the-money		327,476		71,993
Aggregate intrinsic value of options exercised during the year	$	1.88	$	1.00

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

	Number of			Weighted Average
	Shares			Award Price
Unvested at December 31, 2019		112,846		$	1.44
Granted		219,596			1.48
Vested		(167,745	)		1.45
Forfeited		—			—
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
Expected to vest after December 31, 2021		34,614		$	2.72

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

Stock options outstanding	1,664,014
Restricted stock units outstanding	34,614
Performance stock units outstanding	500,000
Stock options available for future grant	1,095,772
Common stock reserved for future issuance	3,294,400