Note 7 - Stockholder's Equity (Details Textual)			1 Months Ended
	Oct. 21, 2020 $ / shares shares	Oct. 09, 2020 shares	Sep. 30, 2020 $ / shares shares	Dec. 01, 2020 $ / shares shares	Aug. 31, 2020 $ / shares
Common Stock, Voting Rights Per Share			1
Preferred Stock, Shares Authorized (in shares)			1,000,000
Preferred Stock, Shares Issued, Total (in shares)			0
Preferred Stock, Shares Outstanding, Ending Balance (in shares)			0
Subsequent Event [Member] | BOC Yellowstone LLC [Member]
Common Stock, Shares Surrendered (in shares)	718,750	1,437,500
Common Class A [Member]
Common Stock, Shares Authorized (in shares)			200,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares			$ 0.0001
Common Stock, Shares, Issued, Total (in shares)			0
Common Stock, Shares, Outstanding, Ending Balance (in shares)			0
Common Class B [Member]
Common Stock, Shares Authorized (in shares)			20,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares			$ 0.0001
Common Stock, Shares, Issued, Total (in shares)			3,593,750
Common Stock, Shares, Outstanding, Ending Balance (in shares)			3,593,750
Common Stock, Conversion Rate			1
Common Stock, Conversion Features, Period After Completion of Initial Business Combination (Year)			1 year
Common Stock, Conversion Features, Minimum Sale Price For 20 Days, Class A Common Stock, At Least 150 Days After Initial Business Combination (in dollars per share) | $ / shares			$ 12
Common Class B [Member] | BOC Yellowstone LLC [Member]
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares					$ 0.0001
Common Stock, Conversion Rate			1
Common Stock Forfeited if Over-Allotment Option is Not Exercised (in shares)			468,750
Percentage of Issued And Outstanding Shares			20.00%
Common Class B [Member] | Subsequent Event [Member]
Common Stock, Shares Surrendered (in shares)	718,750	1,437,500
Share Price (in dollars per share) | $ / shares	$ 0.007			$ 0.00735
Common Class B [Member] | Subsequent Event [Member] | BOC Yellowstone LLC [Member]
Common Stock, Shares, Outstanding, Ending Balance (in shares)	3,593,750			3,399,724
Common Class B [Member] | Before Retroactive Restatement [Member]
Common Stock, Shares, Outstanding, Ending Balance (in shares)			5,750,000