Stockholders' Equity - Equity Offerings (Details) - USD ($) $ / shares in Units, $ in Thousands |
1 Months Ended | 3 Months Ended | 12 Months Ended | |
---|---|---|---|---|
Dec. 14, 2015 |
Jan. 31, 2017 |
Mar. 31, 2017 |
Dec. 31, 2016 |
|
Equity Offerings | ||||
Common stock, shares authorized (in shares) | 100,000,000 | 100,000,000 | ||
Preferred stock, shares authorized (in shares) | 5,000,000 | 5,000,000 | ||
Common stock, par value (in dollars per share) | $ 0.001 | $ 0.001 | ||
Issuance of common stock, net of issuance costs | $ 6,833 | |||
Maximum | ||||
Equity Offerings | ||||
Common stock, par value (in dollars per share) | $ 0.001 | |||
At Market Sales Facility | ||||
Equity Offerings | ||||
Issuance of common stock, net of issuance costs (in shares) | 1,081,550 | 4,815,491 | ||
Issuance of common stock, net of issuance costs | $ 6,800 | $ 32,100 | ||
Remaining amount available | $ 34,900 | |||
At Market Sales Facility | Maximum | ||||
Equity Offerings | ||||
Offering price | $ 75,000 | |||
Commission (as percent) | 3.00% | |||
At Market Sales Facility | Weighted-average | ||||
Equity Offerings | ||||
Offering price (in dollars per share) | $ 6.50 | $ 6.865 |