Note 6 - Commitments (Details Textual) - USD ($)	1 Months Ended
	Sep. 30, 2020	Aug. 31, 2020
Underwriting Agreement, Option Period (Day)	45 days
Underwriting Agreement, Maximum Additional Units (in shares)	1,875,000
Underwriting Agreement, Cash Underwriting Discount, Per Unit (in dollars per share)	$ 0.20
Underwriting Agreement, Cash Underwriting Discount, Aggregate Amount	$ 2,500,000
Underwriting Agreement, Cash Underwriting Discount, Aggregate Amount Including Underwriter Shares	$ 2,875,000
Underwriting Agreement, Deferred Fee, Per Unit (in dollars per share)	$ 0.35
Underwriting Agreement, Deferred Fee, Aggregate Amount	$ 4,375,000
Underwriting Agreement, Deferred Fee, Aggregate Amount Including Underwriter Shares	5,031,250
BOC Yellowstone LLC [Member]
Notes Payable, Total	$ 150,000
Notes Payable, Other Payables [Member] | BOC Yellowstone LLC [Member]
Debt Instrument, Face Amount		$ 300,000