Note 9 - Equity, Share-based Compensation and Warrants (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Schedule of Stockholders Equity [Table Text Block]

	Shares
	Preferred				Preferred		Common		Accumulated
	Series G		Common		Stock		Stock		Deficit			Equity
Balance, December 31, 2021		150		51,589,674	$	75	$	326,279	$	(307,859	)	$	18,495
Common stock awards under equity incentive plans		-		224,751		-		241		-			241
Common stock issued to vendor		-		6,000		-		5		-			5
Net income		-		-		-		-		(1,516	)		(1,516	)
Balance, March 31, 2022		150		51,820,425		75		326,525		(309,375	)		17,225
Common stock awards under equity incentive plans		-		483,879		-		146		-			146
Common stock issued to vendor		-		6,000		-		1		-			1
Net loss		-		-		-		-		(2,621	)		(2,621	)
Balance, June 30, 2022		150		52,310,304	$	75	$	326,672	$	(311,996	)	$	14,751

	Shares
	Preferred				Preferred		Common			Accumulated
	Series G		Common		Stock		Stock			Deficit			Equity
Balance, December 31, 2020		225		45,238,087	$	112	$	322,218		$	(298,910	)	$	23,420
Common stock awards under equity incentive plans		-		29,943		-		250			-			250
Common stock issued to vendor		-		6,000		-		3			-			3
Other		-		-		-		(3	)		-			(3	)
Net income		-		-		-		-			591			591
Balance, March 31, 2021		225		45,274,030		112		322,468			(298,319	)		24,261
Common stock awards under equity incentive plans		-		29,643		-		290			-			290
Common stock issued to vendor		-		6,000		-		5			-			5
Exercise of common stock warrants		-		177,936		-		171			-			171
Other		-		-		-		3			-			3
Net loss		-		-		-		-			(1,923	)		(1,923	)
Balance, June 30, 2021		225		45,487,609	$	112	$	322,937		$	(300,242	)	$	22,807

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

	Three Months Ended
	June 30, 2022		March 31, 2022
Stock options	$	21	$	29
Restricted stock units		125		212
Compensation expense related to common stock awards issued under equity incentive plan	$	146	$	241

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

	Number of RSUs			Unrecognized Stock Compensation (in thousands)			Weighted Average Expense Period (Years)
Nonvested at December 31, 2021		1,266,033		$	(658	)		0.9
Granted		370,000			(153	)		2.0
Forfeited		(10,000	)		7			0.7
Vested with Service		(224,751	)		-			0.0
Expensed		-			212
Nonvested at March 31, 2022		1,401,282			(592	)		0.9
Impact of Modification:
Before modification		(114,680	)		125
After modification		114,680			(60	)
Forfeited		(94,535	)		55			0.0
Vested with Service		(344,040	)		-			0.0
Expensed		-			125
Nonvested at June 30, 2022		962,707		$	(347	)		0.9

	Number of RSUs
Vested at December 31, 2021		865,052
Vested with Service		224,751
Issued at Vesting		(224,751	)
Vested at March 31, 2022		865,052
Vested with Service		344,040
Issued at Termination of Service		(483,879	)
Vested at June 30, 2022		725,213