Note 10 - Long-term Debt (Details Textual)	Dec. 31, 2019 USD ($)
East West Bank [Member] | Debt Instrument, Redemption, Period One [Member]
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 2,293,751
East West Bank [Member] | Debt Instrument, Redemption, Period Two [Member]
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	3,007,239
Capital Bank [Member]
Debt Instrument, Collateral Amount	3,116,687
Bank of America [Member]
Debt Instrument, Collateral Amount	$ 1,382,046