Note 15 - Stock-based Compensation (Tables)

12 Months Ended

Dec. 31, 2021

Notes Tables

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

	Options			Weighted-Average Exercise Price		Weighted-Average Remaining Contractual Term (Years)
Balance at December 31, 2019		7,204,672		$	1.32		5.3
Granted		2,450,000		$	0.14
Expired/Cancelled		(7,069,172	)	$	1.33
Exercised		—
Balance at December 31, 2020		2,585,500		$	0.19		9.2
Granted		99,460,000			0.06
Expired/Cancelled		(97,226,624	)		0.06
Exercised		—
Balance at December 31, 2021		4,818,876			0.08		3.5

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

	RSUs			Weighted-Average Issuance Price
Balance at December 31, 2020		845,106		$	0.14
Granted		80,977,500
Expired/Cancelled		(540,576	)		0.13
Vested		(262,629	)		0.08
Balance at December 31, 2021		81,019,401			0.13

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

	Year Ended December 31,
	2021		2020
Cost of revenue	$	29	$	15
General and administrative		842		550
Sales and marketing		336		163
Research and development		321		134
Total	$	1,528	$	862

Common Stock Reserved for Future Issuance [Table Text Block]

	Common Stock
Convertible preferred stock – Series B and Series D		398,269,637
Stock options outstanding		4,818,876
Restricted Stock Units		81,019,401
Warrants outstanding		3,150,000
Authorized for future grant under stock option plans		63,747,077