Note 3 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2022

Notes Tables

Schedule of Inventory, Current [Table Text Block]

Description	June 30, 2022		December 31, 2021
			(in thousands)
Raw Materials	$	372	$	132
Work-in-Progress		-		338
Finished Goods		3,511		1,988
Total Inventory	$	3,883	$	2,458

Incremental Weighted Average Shares Attributable to Dilutive Effect [Table Text Block]

	June 30, 2022		June 30, 2021
Stock Options		4,198,006		3,072,297
Warrants		6,596,096		7,557,277
Convertible Preferred Stock		6,476,275		6,476,275
Total Potential Dilutive Shares		17,270,377		17,105,849