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v3.8.0.1

Consolidated Statements of Operations - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Revenues | $ 140,380 | [1] | $ 105,481 | [1] | $ 79,722
Cost of sales | 102,396 |  | 74,395 |  | 61,233
Gross profit | 37,984 | [1] | 31,086 | [1] | 18,489
Operating expenses: |  |  |  |  |
Selling, general and administrative | 21,745 |  | 11,651 |  | 9,796
Amortization | 1,107 |  | 488 |  | 512
Total operating expenses | 22,852 | [1] | 12,139 | [1] | 10,308
Operating income | 15,132 | [1] | 18,947 | [1] | 8,181
Other income (expense): |  |  |  |  |
Interest expense | (3,156) |  | (1,118) |  | (776)
Other income (expense) | 28 |  | (564) |  | 302
Total other income (expense) | (3,128) | [1] | (1,682) | [1] | (474)
Income before income taxes | 12,004 | [1] | 17,265 | [1] | 7,707
Income tax expense | 847 | [1] | 6,628 | [1] | 2,944
Net income | $ 11,157 | [1] | $ 10,637 | [1] | $ 4,763
Net income per common share - Basic | $ 0.27 | [1] | $ 0.31 | [1] | $ 0.15
Net income per common share - Diluted | $ 0.26 | [1] | $ 0.3 | [1] | $ 0.14
Weighted average number of shares outstanding - Basic | 41,764,230 | [1] | 34,104,476 | [1] | 32,546,840
Weighted average number of shares outstanding - Diluted | 42,766,843 | [1] | 35,416,910 | [1] | 33,936,099
[1] | The sum of the net earnings per share may not add up to the full year amount due to rounding and because the quarterly calculations are based on varying numbers of shares outstanding.

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