Note 2 - Summary of Significant Accounting Policies (Details Textual)		3 Months Ended
	Aug. 11, 2022 USD ($) shares	Mar. 31, 2023 USD ($) $ / shares shares	Mar. 31, 2022 USD ($) shares	Dec. 31, 2022 USD ($)
Accounts Receivable, Allowance for Credit Loss		$ 3,239		$ 2,283
Accounts Receivable, Credit Loss Expense (Reversal)		1,244	$ 0
Goodwill	$ 737,869	$ 737,869		737,869
Number of Domain Names Owned		242
Intangible Assets, Net (Excluding Goodwill)		$ 1,203,211	0	1,223,926
Amortization of Intangible Assets		20,715	0
Financial Instruments Subject to Mandatory Redemption, Settlement Terms, Share Value, Amount		828,000		576,000
Fair Value Adjustment of Warrants		252,000	0
Deferred Tax Assets, Net		1,409,001
Income Tax Expense (Benefit)		$ 32,233	$ (0)
Weighted Average Number of Shares, Restricted Stock (in shares) | shares		15,750
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares) | shares		2,050,000	0
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants (in shares) | shares		0
Crossing Bridge Advisor LLC [Member] | CrossingBridge Family of Funds [Member]
Assets under Management, Carrying Amount		$ 626,000,000	$ 724,000,000
Crossing Bridge Advisor LLC [Member] | Two 1940 Act Regulated Mutual Funds [Member]
Assets under Management, Carrying Amount		$ 723,000,000	822,000,000
Restricted Stock [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value (in dollars per share) | $ / shares		$ 4.35
Common Class B [Member]
Stock Issued During Period, Shares, Warrant Exercises (in shares) | shares	1,800,000
Common Stock, Conversion Basis, Number of Shares to be Issued (in shares) | shares	1,800,000
Crossing Bridge Advisor LLC [Member]
Goodwill		$ 737,869		737,869
Willow Oak Asset Management LLC [Member]
Intangible Assets, Net (Excluding Goodwill)		523,659
Internet Operations Segments [Member]
Intangible Assets, Net (Excluding Goodwill)		679,552
Internet Operations [Member]
Contract with Customer, Liability		168,047		$ 156,859
Contract with Customer, Liability, Revenue Recognized		$ 70,744	$ 0