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Note 8 - Income Taxes (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016	Jan. 20, 2017	Dec. 31, 2016
Income Tax Expense (Benefit)	$ 1,823,367	$ 2,492,649	$ 2,780,908	$ 6,476,012
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	5,300,000	$ 7,200,000	13,900,000	$ 19,700,000
Unrecognized Tax Benefits	0		0			$ 100,000
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued	0		0			$ 0
eNom, Incorporated [Member]
Deferred Tax Liabilities, Net					$ 21,900,000
Accounting Standards Update 2016-09 [Member]
Income Tax Expense (Benefit)	$ (400,000)		$ (2,600,000)

X

- Definition

Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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-SubTopic 10
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-URI http://asc.fasb.org/extlink&oid=84176650&loc=d3e31931-109318

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