Note 10 - Equity, Share-based Compensation and Warrants (Tables)

3 Months Ended

Mar. 31, 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

	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

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

Stock options	$	29
Restricted stock units		212
Compensation expense related to common stock awards issued under equity incentive plan	$	241

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

	RSU Shares Issued to Employees			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		(224,751	)		-			0.0
Expensed		-			212
Nonvested at March 31, 2022		1,401,282		$	(592	)		0.9