Note 10 - Quarterly Financial Information (Unaudited) - Quarterly Operating Results (Details) - USD ($)	3 Months Ended	12 Months Ended
Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018
Net revenues	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0	$ 0
Operating expenses	2,711,240	221,658	101,885	189,131	104,489	81,332	133,311	450	5,881	3,223,914	319,582
Loss from operations	(2,711,240)	(221,658)	(101,885)	(189,131)	(104,489)	(81,332)	(133,311)	(450)	(5,881)	(3,223,914)	(319,582)
Other income - investment income on Trust Account	1,532,912	2,178,777	2,592,502	2,434,969	2,331,871	1,961,856	1,484,040		0	8,739,160	5,777,767
Income tax provision	321,986	370,572	536,681	500,833	504,446	394,468	284,000		0	1,730,072	1,182,914
Net income (loss)	$ (1,500,314)	$ 1,586,547	$ 1,953,936	$ 1,745,005	$ 1,722,936	$ 1,486,056	$ 1,066,729	$ (450)	$ (5,881)	$ 3,785,174	$ 4,275,271
Common Class A [Member]
Basic and diluted income (loss) per common share (in dollars per share)	$ 0.03	$ 0.04	$ 0.05	$ 0.04	$ 0.04	$ 0.04	$ 0.03		$ 0	$ 0.16	$ 0.11
Common Class B [Member]
Basic and diluted income (loss) per common share (in dollars per share)	$ (0.25)	$ (0.01)	$ (0.01)	$ (0.01)	$ 0	$ 0	$ 0	$ 0	$ 0	$ (0.28)	$ (0.01)

The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or loss for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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