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Note 20 - Selected Quarterly Financial Data (Unaudited) - Quarterly Financial Data (Unaudited) (Details) - USD ($)
$ / shares in Units, $ in Thousands

3 Months Ended

12 Months Ended

Dec. 31, 2018

Sep. 30, 2018

Jun. 30, 2018

Mar. 31, 2018

Dec. 31, 2017

Sep. 30, 2017

Jun. 30, 2017

Mar. 31, 2017

Dec. 31, 2018

Dec. 31, 2017

^[1]

Dec. 31, 2016

^[1]

Net Revenues

$ 85,612

$ 83,519

$ 81,087

$ 95,795

$ 90,621

$ 85,008

$ 84,223

$ 69,568

$ 346,013

$ 329,421

$ 189,819

Gross Profit

27,731

24,262

22,158

22,619

25,736

20,494

21,347

16,944

96,770

84,521

63,054

Net income

$ 4,436

$ 5,347

$ 3,608

$ 3,744

$ 11,199

$ 3,439

$ 5,241

$ 2,446

$ 17,135

$ 22,327

^[2]

$ 16,067

^[2]

Basic (in dollars per share)

$ 0.42

$ 0.50

$ 0.34

$ 0.35

$ 1.06

$ 0.33

$ 0.50

$ 0.23

$ 1.62

$ 2.12

$ 1.53

Diluted (in dollars per share)

$ 0.41

$ 0.50

$ 0.33

$ 0.35

$ 1.04

$ 0.32

$ 0.49

$ 0.23

$ 1.59

$ 2.07

$ 1.50

[1]	The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.
[2]	The Company has initially applied ASC 2014-09 (Topic 606) using the modified retrospective method. Under this method, the comparative information is not restated.

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