Note 11 - Stock-based Compensation (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

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

	Stock Options			Weighted Average Exercise Price		Weighted Average Remaining Contractual Life (in years)		Aggregate Intrinsic Value
Outstanding at January 1, 2022		7,123		$	0.54		7.5	$	-
Options forfeited/expired		(913	)		0.44		-		-
Outstanding at June 30, 2022		6,210		$	0.56		6.9	$	-
Options vested and exercisable at June 30, 2022		6,353		$	0.55		6.7	$	-

Schedule of Unvested Restricted Stock Units Roll Forward [Table Text Block]

	Number of Shares			Weighted Average Grant Date Fair Value per Share
Nonvested at January 1, 2022		1,750		$	0.044
Restricted stock granted		6,317			0.037
Vested		(750	)		-
Forfeited		(230	)		-
Nonvested at June 30, 2022		7,087		$	0.037