Note 3 - Acquisitions (Details Textual) - USD ($)			1 Months Ended	5 Months Ended
	Sep. 01, 2021	May 03, 2021	Sep. 30, 2021	Sep. 30, 2021	Aug. 09, 2021	Dec. 31, 2020
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total			$ 8,822,000	$ 8,822,000
Goodwill, Ending Balance			223,936,000	223,936,000		$ 58,449,000
Sexton Acquisition [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	530,502
Business Acquisition, Percentage of Equity Issuable Shares Held in Escrow Accounts for Post Closing Claims	10.00%
Business Combination, Step Acquisition, Equity Interest in Acquiree, Remeasurement Gain (Loss), Net, Total	$ 6,500,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets	4,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities	1,284,000				$ 1,300,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	8,800,000
Goodwill, Ending Balance	28,273,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Gross Receivables	509,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Uncollectable Receivables	$ 17,000
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual			425,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual			$ 227,000
Sexton Acquisition [Member] | Common Stock Issued to Acquire Participating Holders [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	477,452
Sexton Acquisition [Member] | Common Stock Deposited Into Escrow [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	53,050
GCI Acquisition [Member]
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)		6,636,470
Business Acquisition, Percentage of Equity Issuable Shares Held in Escrow Accounts for Post Closing Claims		9.00%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Tangible Assets		$ 740,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities		23,526,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total		120,480,000
Goodwill, Ending Balance		137,215,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Gross Receivables		7,100,000
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Current Assets, Uncollectable Receivables		$ 53,000
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares, Before Adjustments (in shares)		6,646,870
Business Combination, Stock Reduced During Period, Satisfy Note Receivable (in shares)		10,400
Business Combination, Escrow Shares, Period (Month)		24 months
Business Combination, Pro Forma Information, Revenue of Acquiree since Acquisition Date, Actual				28,500,000
Business Combination, Pro Forma Information, Earnings or Loss of Acquiree since Acquisition Date, Actual				$ 7,600,000
GCI Acquisition [Member] | One GCI Stockholder [Member]
Business Combination, Stock Reduced During Period, Satisfy Note Receivable (in shares)		10,400
Financing Receivable, after Allowance for Credit Loss, Total		$ 374,000