Note 15 - Subsequent Events (Details Textual)	Jan. 13, 2020 shares
Subsequent Event [Member]
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	3,000,000

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

No definition available.

Name:	us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant