Note 11 - Subsequent Events - Acquisitions (Details) - USD ($)			1 Months Ended	3 Months Ended		9 Months Ended
		Oct. 01, 2018	Nov. 30, 2018	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Subsequent Event [Line Items]
Common stock consideration						$ 80,637,194
Cash paid	[1]					8,333,535
Business Combination, Acquisition Related Costs				$ 1,292,043	$ 407,997	1,798,184	$ 407,997
Bates Companies [Member]
Subsequent Event [Line Items]
Business Combination, Acquisition Related Costs						$ 401,000
Bates Companies [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Assets under management		$ 700,000,000
Business Acquisition, Percentage of Voting Interests Acquired		100.00%
Cash consideration		$ 3,000,000
Cash paid		$ 1,500,000
Issuance of shares of common stock as a result of the acquisition, net of issuance cost			$ 1,000,000
Number of shares expecting to issue based on 10-day volume weighted average of the closing stock price of the Company ending five days prior to closing		70,504
Bates Companies [Member] | Subsequent Event [Member] | Promissory Note [Member]
Subsequent Event [Line Items]
Promissory note recorded		$ 1,500,000
Repayment period (in years)		5 years
Frequency of installments		annual installments
Periodic payment of principal amount		$ 300,000
Interest rate (as a percent)		2.18%
Maximum | Bates Companies [Member] | Subsequent Event [Member]
Subsequent Event [Line Items]
Common stock consideration		$ 3,000,000

[1] Net cash paid at closing totalted $3,747,209