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Condensed Statements of Operations - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Revenues:        
Product sales $ 48,948 $ 0 $ 162,901 $ 0
Other revenue 10,496 0 14,354 0
Total revenues 59,444 0 177,255 0
Cost of revenues 35,695 0 96,915 0
Gross profit 23,749 0 80,340 0
Operating expenses:        
Selling, general and administrative 1,481,187 581,575 2,669,063 920,742
Research and development 516,213 193,629 891,032 289,614
Total operating expenses 1,997,400 775,204 3,560,095 1,210,356
Loss from operations (1,973,651) (775,204) (3,479,755) (1,210,356)
Other income (expense):        
Interest income 61,777 537 87,187 758
Other (2,200) (875) (2,287) (1,322)
Other income (expense) 59,577 (338) 84,900 (564)
Net loss $ (1,914,074) $ (775,542) $ (3,394,855) $ (1,210,920)
Net loss per basic common share $ (0.07) $ (0.03) $ (0.12) $ (0.05)
Weighted average common shares used to compute net loss per basic common share 27,848,421 22,803,533 27,606,514 22,803,533