Note 14 - Equity (Tables)

3 Months Ended

Mar. 31, 2020

Notes Tables

Schedule of Stockholders Equity [Table Text Block]

	Common Stock						Additional Paid-in			Accumulated			Other Comprehensive		Total Stockholders'
	Shares			Amount			Capital			Deficit			Income		Equity
Balances at December 31, 2019		81,269,868		$	8,127		$	220,808,037		$	(123,032,408	)	$	—	$	97,783,756
Net loss					—			—			(8,897,529	)		—		(8,897,529	)
Repurchase of common stock		(225,094	)		(22	)		—			(993,353	)		—		(993,375	)
Payment of common stock tendered for employee stock-based compensation tax obligations		(1,892	)		—			(9,746	)		—			—		(9,746	)
Issuance of common stock upon vesting of RSUs		4,542			—						—			—		-
Stock-based compensation		—			—			259,016			—			—		259,016
Balances at March 31, 2020		81,047,424		$	8,105		$	221,057,307		$	(132,923,290	)	$	—	$	88,142,122

	Common Stock						Additional Paid-in			Accumulated			Other Comprehensive		Total Stockholders'
	Shares			Amount			Capital			Deficit			Income		Equity
Balances at December 31, 2018		80,763,350		$	8,076		$	218,697,872		$	(115,791,261	)	$	—	$	102,914,687
Net income		—			—			—			1,629,777			—		1,629,777
Issuance of common stock upon exercise of stock options		9,769			1			(1	)		—			—		—
Issuance of common stock upon exercise of stock-settled appreciation rights		16,771			2			(2	)		—			—		—
Issuance of common stock upon exercise of warrants		159,782			16			1,172,785			—			—		1,172,801
Payment of common stock tendered for employee stock-based compensation tax obligations		(8,148	)		(1	)		(56,589	)		—			—		(56,590	)
Stock-based compensation		—			—			408,894			—			—		408,894
Balances at March 31, 2019	$	80,941,524		$	8,094		$	220,222,959		$	(114,161,484	)	$	—	$	106,069,569