Note 13 - Related-party Transactions and Balances (Details Textual) - USD ($)	1 Months Ended
Apr. 30, 2019	Jun. 30, 2019
Skywords Note [Member] \| Unsecured Subordinated Loan [Member]
Debt Instrument, Face Amount	$ 1,500,000
Skywords Note [Member] \| Unsecured Subordinated Loan [Member] \| Prime Rate [Member]
Debt Instrument, Basis Spread on Variable Rate	1.00%
Director [Member]
Due to Related Parties, Total		$ 120,000

Carrying amount as of the balance sheet date of obligations due all related parties.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(k)(1))
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 210
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
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-Section 50
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant