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Condensed Consolidated Statements of Income and Retained Earnings (Unaudited) - USD ($) shares in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Income Statement [Abstract] |  |  |  |
Net sales | $ 21,441 | $ 17,224 | $ 50,992 | $ 38,075
Cost of products sold | 15,214 | 13,483 | 37,623 | 29,556
Gross profit | 6,227 | 3,741 | 13,369 | 8,519
Other expenses and income: |  |  |  |
Selling, general and administrative | 4,718 | 3,671 | 9,269 | 7,325
Selling, general and administrative – amortization | 60 | 60 | 119 | 118
Restructuring charge |  | 316 |  | 316
Other income | (206) | (120) | (412) | (239)
Interest income | (351) | (162) | (640) | (313)
Interest expense | 1 | 2 | 3 | 5
Total other expenses and income | 4,222 | 3,767 | 8,339 | 7,212
Income (loss) before provision (benefit) for income taxes | 2,005 | (26) | 5,030 | 1,307
Provision (benefit) for income taxes | 178 | (36) | 880 | 362
Net income | 1,827 | 10 | 4,150 | 945
Retained earnings at beginning of period | 99,427 | 110,600 | 99,011 | 110,544
Cumulative effect of change in accounting principle, net of income tax benefit of $301 |  |  | (1,022) |
Dividends | (983) | (879) | (1,868) | (1,758)
Retained earnings at end of period | $ 100,271 | $ 109,731 | $ 100,271 | $ 109,731
Basic: |  |  |  |
Net income | $ 0.19 |  | $ 0.42 | $ 0.10
Diluted: |  |  |  |
Net income | $ 0.19 |  | $ 0.42 | $ 0.10
Weighted average common shares outstanding: |  |  |  |
Basic | 9,832 | 9,769 | 9,810 | 9,759
Diluted | 9,848 | 9,775 | 9,826 | 9,767
Dividends declared per share | $ 0.10 | $ 0.09 | $ 0.19 | $ 0.18

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- Definition The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 330 -SubTopic 10 -Section 30 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=68048583&loc=d3e3636-108311 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.4) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 + Details
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- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=109260490&loc=d3e1505-109256 + Details
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- References No definition available. + Details
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- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=109260490&loc=d3e1448-109256 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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