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Note 9 - Earnings Per Share - Computation of Net Income Per Share, Basic & Diluted (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended						9 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Dec. 31, 2018	Dec. 31, 2017
Net income (loss) available for shareholders	$ 858	$ 994	$ 4,230	$ (11,086)	$ 2,353	$ 1,517	$ 6,082	$ (7,216)	[1]
Basic (in shares)	3,855			3,781			3,840	3,765
Dilutive effect of stock options (in shares)	180						182
Dilutive effect of non-vested shares (in shares)	10						15
Fully diluted shares (in shares)	4,045			3,781			4,037	3,765
Basic (in dollars per share)	$ 0.22			$ (2.93)			$ 1.58	$ (1.92)
Diluted (in dollars per share)	$ 0.21			$ (2.93)			$ 1.51	$ (1.92)
[1] -Contingent consideration is classified as a financing activity pursuant to ASU 2016-15.

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