Note 4 - Acquisition - Assets Acquired and Liabilities Assumed (Details) - USD ($)	Dec. 31, 2017	Dec. 31, 2016	Jan. 08, 2016
Goodwill	$ 6,929,258	$ 6,929,258
Diffusion LLC [Member]
Cash and cash equivalents			$ 8,500,602
Prepaid expenses and other assets			195,200
Property and equipment			57,531
Intangible assets			9,600,000
Goodwill			6,929,258
Accrued liabilities			(377,432)
Deferred tax liability			(3,644,159)
Net assets acquired			$ 21,261,000

Amount of accrued liabilities assumed at the acquisition date.

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Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Amount of asset related to consideration paid in advance for costs that provide economic benefits in future periods, and amount of other assets that are expected to be realized or consumed within one year or the normal operating cycle, if longer, acquired at the acquisition date.

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Amount of deferred tax liability attributable to taxable temporary differences assumed at the acquisition date.

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Amount of intangible assets, excluding goodwill, acquired at the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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