Note 18 - Fair Value of Financial Instruments (Details Textual) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Other Commitment, Total	$ 132,605,000	$ 146,450,000
Commitments to Extend Credit [Member]
Other Commitment, Total	$ 133,220,000	$ 147,526,000

Minimum amount of other commitment not otherwise specified in the taxonomy. Excludes commitments explicitly modeled in the taxonomy, including but not limited to, long-term and short-term purchase commitments, recorded and unrecorded purchase obligations, supply commitments, registration payment arrangements, leases, debt, product warranties, guarantees, environmental remediation obligations, and pensions.

No definition available.

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