Note 10 - Stockholders' Equity (Tables)

12 Months Ended

Dec. 31, 2019

Notes Tables

Disclosure of Shares Issued as Share-based Compensation and Royalty Payments [Table Text Block]

(Dollars in thousands)
Date of issuance	Type of issuance	Expense/ Prepaid/ Cash	Stock issuance recipient	Reason for issuance	Total no. of shares		Grant date fair value or net proceeds recorded at issuance
January, April, July, and October 2019	Vested restricted common stock	Expense	Four board members	Director compensation		164,713	$	162
May 2019	Common stock	Expense	Employee	Approved bonus		18,837		17
Total 2019 issuances						183,550	$	179	(1)
January, April, July and October 2018	Vested restricted common stock	Expense	Four board members	Director compensation		72,157	$	175
January and July 2018	Common stock	Expense	Three Employees	Approved bonuses		68,118		183	(2)
July and December 2018	Common stock	Expense	Related Party, James McKenzie	Pursuant to royalty agreement		5,755		14	(2)
Total 2018 issuances						146,030	$	372	(3)(4)
January, April, August and October 2017	Vested restricted common stock	Expense	Four board members	Director compensation		49,980	$	200
January, February and June 2017	Common stock	Expense	Three Employees	Approved bonuses		28,634		182	(5)
January and December 2017	Common stock	Expense	Related party, James McKenzie	Pursuant to royalty agreement		3,293		16	(5)
January and February 2017	Common stock	Expense	Two Employees	Cashless stock option exercises		245		—	(6)
May 2017	Common stock	Prepaid expense/expense	Third-party consultant	Strategic investor marketing services		15,000		57	(7)
October 2017	Common stock	Cash	Various third-party shareholders	Equity raise		7,392,856		18,905
Total 2017 issuances						7,490,008	$	19,360	(8)

Summary of Warrants and Options Issued [Table Text Block]

	For the Year Ended December 31, 2019
	Number of Options			Weighted Average Exercise Price ($)		Weighted Average Remaining Contract Life (years)		Aggregate Intrinsic Value ($ '000)
Balance at beginning of year		923,898		$	6.32		3.64	$	—
Expired		(74,263	)		7.22
Balance at end of year		849,635		$	6.24		2.95		—
Exercisable		849,635		$	6.24		2.95		—