Note 13 - Net Income (Loss) Per Ordinary Share - Basic and Diluted Net Loss Per Share (Details) - USD ($)	3 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018
Net income (loss) from continuing operations		$ (1,340,000)	$ 12,505,000
Less: Net income (loss) from discontinued operations, net of tax	$ (469,000)	(469,000)	108,274,000
Net income (loss)		$ (1,809,000)	$ 120,779,000
Weighted-average ordinary shares outstanding-basic (in shares)		26,569,342	25,982,809
Dilutive effect of ordinary share equivalents resulting from ordinary share options, unvested restricted shares and RSUs (in shares)			415,066
Weighted-average ordinary shares outstanding-diluted (in shares)		26,569,342	26,397,875