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Consolidated Statements of Income - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Revenue    
Products sales and leasing $ 30,983,368 $ 23,855,724
Shipping and installation revenue 7,272,797 3,606,205
Royalties 1,793,881 1,742,310
Total revenue 40,050,046 29,204,239
Cost of goods sold 29,701,150 22,093,834
Gross profit 10,348,896 7,110,405
General and administrative expenses 3,891,472 3,365,513
Selling expenses 2,120,978 2,168,013
Total operating expenses 6,012,450 5,533,526
Operating income 4,336,446 1,576,879
Other income (expense)    
Interest expense (162,529) (103,086)
Interest income 36,684 35,720
Gain on sale of assets 32,140 17,381
Other income 54,459 74,410
Total other income (expense) (39,246) 24,425
Income before income tax expense 4,297,200 1,601,304
Income tax expense 1,462,000 557,000
Net income $ 2,835,200 $ 1,044,304
Basic earnings per share (in dollars per share) $ 0.57 $ 0.21
Diluted earnings per share (in dollars per share) $ 0.56 $ 0.21