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Amount of stock repurchase plan authorized.

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Ratio applied to the conversion of stock split, for example but not limited to, one share converted to two or two shares converted to one.

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Note 7 - Stockholders' Equity (Details Textual) $ / shares in Units, $ in Millions	Feb. 27, 2018 shares	Jan. 30, 2018 USD ($) $ / shares shares	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 shares
Stockholders' Equity Note, Stock Split, Conversion Ratio		1.5543
Stock Issued During Period, Shares, New Issues	1,537,500
Proceeds from Issuance Initial Public Offering \| $		$ 171.5
Common Stock, Shares, Issued, Total			35,534,558	35,353,296
Reclassification From Liabilities to Additional Paid in Capital \| $		$ 1.3
Stock Repurchase Program, Authorized Amount \| $			$ 50.0
Management [Member]
Common Stock, Shares, Issued, Total		170,712
IPO [Member]
Stock Issued During Period, Shares, New Issues		10,250,000
Shares Issued, Price Per Share \| $ / shares		$ 16