Related Party Transactions	12 Months Ended
Dec. 31, 2019
Related Party Transactions [Abstract]
Related Party Transactions	15. Related Party Transactions During the year ended December 31, 2019, three stockholders sold approximately 4.3 million shares of our common stock in a registered public offering. In a separate private transaction, a certain selling stockholder sold 1,750,000 shares of our common stock. The offering and private transaction, together the “Transactions”, closed on April 11, 2019. We did not receive any proceeds from sales by the selling stockholders in the Transactions. We incurred costs and expenses in connection with the Transactions, consisting of various registration, due diligence, printing, and professional service fees and expenses, and such costs, less amounts reimbursed by the selling stockholders at the closing of the Transactions, were approximately $248,000, and are included in selling, general, and administrative expense for the year ended December 31, 2019.

Related Party Transactions

12 Months Ended

Dec. 31, 2019

15. Related Party Transactions

During the year ended December 31, 2019, three stockholders sold approximately 4.3 million shares of our common stock in a registered public offering. In a separate private transaction, a certain selling stockholder sold 1,750,000 shares of our common stock. The offering and private transaction, together the “Transactions”, closed on April 11, 2019. We did not receive any proceeds from sales by the selling stockholders in the Transactions. We incurred costs and expenses in connection with the Transactions, consisting of various registration, due diligence, printing, and professional service fees and expenses, and such costs, less amounts reimbursed by the selling stockholders at the closing of the Transactions, were approximately $248,000, and are included in selling, general, and administrative expense for the year ended December 31, 2019.