Note 6 - Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

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

	Three Months Ended March 31,
	2023			2022
Dividend yield		0	%		0	%
Expected life (years)		5.9			4.9
Expected volatility		96	%		111	%
Risk-free interest rate		2.9	%		1.8	%

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

	Three Months Ended March 31,
	2023		2022
Cost of revenue — Edge to Cloud	$	2	$	6
Selling, general and administrative		12		66
Research and development		1		3
Total stock-based compensation expense	$	15	$	75

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		—			—
Exercised		(24,167	)		1.02
Forfeited		(40,026	)		1.39
Expired		(92,839	)		2.75
Balance at March 31, 2023		1,382,246			2.05		5.39		25,642
Vested and expected to vest at March 31, 2023		1,382,246			2.05		5.39		25,642
Exercisable at March 31, 2023		1,133,477			2.16		4.87		18,908

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

	Three Months Ended March 31,
	2023		2022
Weighted average grant-date fair value of options granted during the period	$	—	$	1.84
Options in-the-money (in shares)		203,316		312,661
Aggregate intrinsic value of options exercised during the period	$	3,616	$	1.20

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		—			—
Vested		(16,960	)		3.25
Forfeited		(7,692	)		3.25
Unvested at March 31, 2023		20,457			3.25
Expected to vest after March 31, 2023		20,457			3.25

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

	March 31, 2023
Stock options outstanding		1,382,246
Restricted stock units and performance stock units outstanding		270,457
Stock options and restricted stock units available for future grant		920,743
Common stock reserved for future issuance		2,573,446