Consolidated Statements of Stockholders' Equity (Parentheticals) - USD ($)	12 Months Ended
Dec. 31, 2018	Dec. 31, 2017
Sale of Common Stock in Class A Units [Member]
Issuance of common stock, issuance costs		$ 65,816
Issuance of common stock and warrants, issuance costs	$ 1,333,449	768,412
Issuance of common stock, issuance costs		$ 267,231

Amount of decrease in additional paid in capital (APIC) resulting from direct costs associated with issuing stock. Includes, but is not limited to, legal and accounting fees and direct costs associated with stock issues under a shelf registration.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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