Note 11 - Acquisition of Businesses (Details Textual) - USD ($) $ / shares in Units, $ in Thousands		3 Months Ended		6 Months Ended
	May 02, 2018	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018	Dec. 01, 2017	Aug. 21, 2017	Mar. 08, 2016
Business Combination, Contingent Consideration, Liability, Current		$ 2,212		$ 2,212		$ 941
CID Resources [Member]
Payments to Acquire Businesses, Gross	$ 84,430
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares	150,094
Working Capital Target Amount	$ 2,500
Goodwill, Purchase Accounting Adjustments		2,400		2,400
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Inventory		(1,800)		(1,800)
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Accounts Payable		600		600
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	41,020
Amortization of Intangible Assets, Total		500	$ 300	1,000	$ 800
Business Acquisition, Pro Forma Revenue			5,100		22,300
Business Acquisition, Pro Forma Net Income (Loss)			$ 1,300		$ 2,600
Business Acquisition, Pro Forma Earnings Per Share, Basic			$ 0.80		$ 0.17
CID Resources [Member] | Trade Names [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	14,200
CID Resources [Member] | Customer Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	$ 26,000
Finite-Lived Intangible Asset, Useful Life	15 years
CID Resources [Member] | Noncompete Agreements [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total	$ 800
Finite-Lived Intangible Asset, Useful Life	5 years
BAMKO [Member]
Business Combination, Liabilities Arising From Contingencies, Earn Out Liability, Before Discount									$ 5,500
Business Combination, Contingent Consideration, Liability, Total		3,200		3,200
Business Combination, Contingent Consideration, Liability, Current		1,200		1,200
Public Identity [Member]
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High								$ 400
Tangerine [Member]
Business Combination, Liabilities Arising From Contingencies, Earn Out Liability, Before Discount							$ 3,200
Business Combination, Contingent Consideration, Liability, Total		$ 2,600		$ 2,600