Liquidity	6 Months Ended
Jun. 30, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Liquidity	3. LIQUIDITY The Company has experienced recurring losses and cash outflows from operating activities. Since inception through June 30, 2019, the Company has an accumulated deficit of $391.2 million. As of June 30, 2019, the Company had cash and cash equivalents and short-term investments of $58.2 million. On April 10, 2019, the Company completed an underwritten offering providing for the issuance and sale of 3,418,918 shares of the Company’s common stock, par value $0.001 per share, at an offering price of $8.51 per share, for net proceeds of approximately $27.9 million, after deducting offering expenses payable by the Company. Based upon the current status of the Company’s product development and commercialization plans, the Company believes that its existing cash, cash equivalents and short-term investments will be adequate to satisfy its capital needs for at least the next 12 months from the date of filing. However, the Company anticipates needing substantial additional financing to continue clinical deployment and commercialization of its lead product SkinTE, development of its other product candidates, and scaling the manufacturing capacity for its products and product candidates and prepare for commercial readiness. However, the Company will continue to pursue fundraising opportunities when available, but such financing may not be available in the future on terms favorable to the Company, if at all. If adequate financing is not available, the Company may be required to delay, reduce the scope of, or eliminate one or more of its product development programs. The Company plans to meet its capital requirements primarily through issuances of equity securities, debt financing, revenue from product sales and future collaborations. Failure to generate revenue or raise additional capital would adversely affect the Company’s ability to achieve its intended business objectives.

Liquidity

6 Months Ended

Jun. 30, 2019

Organization, Consolidation and Presentation of Financial Statements [Abstract]

3. LIQUIDITY

The Company has experienced recurring losses and cash outflows from operating activities. Since inception through June 30, 2019, the Company has an accumulated deficit of $391.2 million. As of June 30, 2019, the Company had cash and cash equivalents and short-term investments of $58.2 million.

On April 10, 2019, the Company completed an underwritten offering providing for the issuance and sale of 3,418,918 shares of the Company’s common stock, par value $0.001 per share, at an offering price of $8.51 per share, for net proceeds of approximately $27.9 million, after deducting offering expenses payable by the Company.

Based upon the current status of the Company’s product development and commercialization plans, the Company believes that its existing cash, cash equivalents and short-term investments will be adequate to satisfy its capital needs for at least the next 12 months from the date of filing. However, the Company anticipates needing substantial additional financing to continue clinical deployment and commercialization of its lead product SkinTE, development of its other product candidates, and scaling the manufacturing capacity for its products and product candidates and prepare for commercial readiness. However, the Company will continue to pursue fundraising opportunities when available, but such financing may not be available in the future on terms favorable to the Company, if at all. If adequate financing is not available, the Company may be required to delay, reduce the scope of, or eliminate one or more of its product development programs. The Company plans to meet its capital requirements primarily through issuances of equity securities, debt financing, revenue from product sales and future collaborations. Failure to generate revenue or raise additional capital would adversely affect the Company’s ability to achieve its intended business objectives.