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Common Stock and Preferred Stock	6 Months Ended
	Jun. 30, 2019
Common Stock and Preferred Stock
Common Stock and Preferred Stock	6. Common Stock and Preferred Stock During the second quarter of 2018, the Company completed its IPO, in which the Company sold 6,164,000 shares of common stock, including all additional shares available to cover over-allotments, at a price of $14.00 per share. The Company received aggregate net proceeds of approximately $77.8 million, after deducting underwriting discounts and commissions and other offering expenses payable by the Company. Upon the closing of the IPO, all outstanding shares of convertible preferred stock converted into 15,109,950 shares of common stock. In connection with the consummation of the IPO, on May 29, 2018 the Company filed an amended and restated certificate of incorporation, which increased the number of shares of common stock authorized for issuance thereunder by 90,000,000 shares to 150,000,000 shares and also authorized for issuance 10,000,000 shares of Preferred Stock, par value $0.001. As of June 30, 2019, no shares of the Preferred Stock were issued or outstanding. In June 2019, the Company sold 3,000,000 shares of its common stock through an underwritten public offering at a price of $15.00 per share. The offering was made pursuant to the Company’s effective shelf registration statement on Form S-3.  As a result of the offering, the Company received aggregate net proceeds, after underwriting discounts and commissions and other estimated offering expenses, of approximately $42.0 million.  The Company also granted the underwriters an option exercisable for 30 days to purchase up to an additional 450,000 shares of common stock at the same price of $15.00 per share, less underwriting discounts and commissions, which was settled in July 2019 (Note 12).

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The entire disclosure for shareholders' equity comprised of portions attributable to the parent entity and noncontrolling interest, including other comprehensive income. Includes, but is not limited to, balances of common stock, preferred stock, additional paid-in capital, other capital and retained earnings, accumulated balance for each classification of other comprehensive income and amount of comprehensive income.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-URI http://asc.fasb.org/topic&trid=2208762

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