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Note 19 - Summary of Quarterly Results (Unaudited) - Statement of Operations Data (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands | 3 Months Ended | 12 Months Ended
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Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2017 | Jun. 30, 2016 | Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2013
Net sales | $ 83,419 | $ 78,156 | $ 85,658 | $ 84,159 | $ 80,844 | $ 70,740 | $ 84,687 | $ 85,925 | $ 76,073 | $ 68,603 | $ 84,715 | $ 78,466 | $ 331,392 | [1] | $ 322,196 | [1] | $ 307,857 | [1] | $ 299,463 | $ 280,790
Cost of products and services sold |  |  |  |  |  |  |  |  |  |  |  |  | 248,012 |  | 238,525 |  | 233,408 |  | 234,165 | 220,380
Restructuring costs |  |  |  |  |  |  |  |  |  |  |  |  | 1,503 |  |  |  |  |  |  |
Loss on sale of subsidiary |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 565 |  |  |
Gain on sale of building |  |  |  |  |  |  |  |  |  |  |  |  | (1,361) |  |  |  | (343) |  |  |
Acquisition deal costs |  |  |  |  |  |  |  |  |  |  |  |  | 1,608 |  |  |  |  |  |  |
Restructuring costs (in SG&A) |  |  |  |  |  |  |  |  |  |  |  |  | (1,091) |  |  |  |  |  |  |
Selling and administrative expenses |  |  |  |  |  |  |  |  |  |  |  |  | 77,272 |  | 69,715 |  | 66,694 |  | 62,175 | 57,367
Impairment of intangible asset |  |  |  |  |  |  |  |  |  |  |  |  | 479 |  |  |  |  |  | 805 | 2,413
Operating income (loss) |  |  |  |  |  |  |  |  |  |  |  |  | 3,609 |  | 13,956 |  | 7,533 |  | 2,318 | 630
Interest (income) |  |  |  |  |  |  |  |  |  |  |  |  | (91) |  | (84) |  | (26) |  | (17) | (47)
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | 620 |  | 36 |  | 45 |  | 68 | 62
Income before income taxes |  |  |  |  |  |  |  |  |  |  |  |  | 3,080 |  | 14,004 |  | 7,514 |  | 2,267 | 615
Income tax expense |  |  |  |  |  |  |  |  |  |  |  |  | 80 |  | 4,522 |  | 2,363 |  | 1,337 | 738
Net income | $ 696 | $ (531) | $ 2,006 | $ 829 | $ 1,428 | $ 522 | $ 3,782 | $ 3,750 | $ 1,643 | $ 393 | $ 1,588 | $ 1,527 | $ 3,000 |  | $ 9,482 |  | $ 5,151 |  | $ 930 | $ (123)
Basic (in dollars per share) | $ 0.03 | $ (0.02) | $ 0.08 | $ 0.03 | $ 0.06 | $ 0.02 | $ 0.15 | $ 0.15 | $ 0.07 | $ 0.02 | $ 0.06 | $ 0.06 | $ 0.12 |  | $ 0.38 |  | $ 0.21 |  | $ 0.04 | $ (0.01)
Diluted (in dollars per share) | $ 0.03 | $ (0.02) | $ 0.08 | $ 0.03 | $ 0.06 | $ 0.02 | $ 0.15 | $ 0.15 | $ 0.07 | $ 0.02 | $ 0.06 | $ 0.06 | 0.12 |  | 0.37 |  | 0.21 |  | 0.04 | (0.01)
Dividends, per share (in dollars per share) |  |  |  |  |  |  |  |  |  |  |  |  | $ 0.20 |  | $ 0.17 |  | $ 0.12 |  | $ 0.24 | $ 0.36
Basic (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 25,436 |  | 24,988 |  | 24,496 |  | 24,388 | 24,313
Diluted (in shares) |  |  |  |  |  |  |  |  |  |  |  |  | 25,988 | [2] | 25,592 | [2] | 24,638 | [2] | 24,546 | 24,313
Working capital | $ 61,704 |  |  |  | $ 88,510 |  |  |  | $ 80,813 |  |  |  | $ 61,704 |  | $ 88,510 |  | $ 80,813 |  | $ 74,349 | $ 74,647
Total assets | 256,680 |  |  |  | 195,560 |  |  |  | 180,690 |  |  |  | 256,680 |  | 195,560 |  | 180,690 |  | 168,688 | 169,179
Long-Term Debt | 49,698 |  |  |  |  |  |  |  |  |  |  |  | 49,698 |  |  |  |  |  |  |
Shareholders’ equity | $ 160,078 |  |  |  | $ 155,520 |  |  |  | $ 142,952 |  |  |  | $ 160,078 |  | $ 155,520 |  | $ 142,952 |  | $ 138,412 | $ 141,690
[1] | Net sales are attributed to geographic areas based upon the location of the operation making the sale.
[2] | Options to purchase 1,331,300 common shares, 1,331,300 common shares, and 1,882,722 common shares at June 30, 2017, 2016, and 2015, respectively, were not included in the computation of diluted earnings per share because the exercise price was greater than the average fair market value of the common shares.

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