Note 10 - Stock Repurchase Plan (Details Textual) - USD ($) $ in Thousands	3 Months Ended	56 Months Ended
Mar. 31, 2020	Jun. 30, 2020	Jul. 31, 2019
Stock Repurchase Program, Authorized Amount			$ 3,000
Stock Repurchased and Retired During Period, Shares (in shares)	13,767	243,075
Stock Repurchased and Retired During Period, Value	$ 74	$ 1,216
Payments for Stock Repurchased Broker Fees		$ 6

Equity impact of the value of stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital).

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