Note 11 - Subsequent Event (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	1 Months Ended	3 Months Ended		9 Months Ended
	Oct. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Sep. 30, 2021
Treasury Stock, Value, Acquired, Cost Method		$ 51	$ 1,588
Share Repurchase Program Authorized in May 2021 [Member]
Treasury Stock, Shares, Acquired (in shares)				236,159
Treasury Stock, Value, Acquired, Cost Method				$ 1,600
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)				$ 6.94
Subsequent Event [Member] | Share Repurchase Program Authorized in May 2021 [Member]
Treasury Stock, Shares, Acquired (in shares)	4,300,000
Treasury Stock, Value, Acquired, Cost Method	$ 38,700
Treasury Stock Acquired, Average Cost Per Share (in dollars per share)	$ 9.00